# InterviewBit Problems

Next Permutation : Solved Good Ranges : Solved Points on the Straight Line : Solved Two out of Three : Unsolved Height of every node in a tree : Unsolved Longest Common Prefix : Solved Sort stack using another stack : Unsolved TEMPLATES : Unsolved Burn a Tree : Unsolved Find the Defective Ball II : Solved Subarrays Xor less Than B : Unsolved Distribute candies : Unsolved Gates of Heaven : Unsolved KEEP SWAPPING : Unsolved Design Messenger : Solved Vowels : Unsolved Clone a linked list : Unsolved Starting indices of the substrings in s : Unsolved Numbers with most occurences : Unsolved Task Scheduler : Solved CHOOSE4 : Unsolved Breaking Chocolate Bars : Unsolved Sorted Array To Balanced BST : Solved Count Complete Tree Nodes : Solved Sum binary tree or not : Unsolved Valid Email Address : Solved Right view of Binary tree : Solved Number of sextuplets (or six values) th : Unsolved Subarrays with B Different Integers : Unsolved QUIRKS MODE : Solved WiFi Routers : Unsolved Special Integer : Solved Unique Binary Search Trees : Unsolved LOOP_CMPL2 : Solved Counting Triangles : Unsolved Subarrays Xor less Than B : Solved Painter's Partition Problem : Unsolved Height of every node in a tree : Solved KEEP SWAPPING : Solved REC_CMPL1 : Unsolved Valid phone number : Solved Greatest Common Divisor : Solved Even Reverse : Solved Merge K sorted arrays! : Solved ARRAY_2D : Solved Daughters' Ages : Solved The Sequence game : Unsolved WiFi Routers : Solved Valid Email Address : Unsolved Count Delete : Unsolved Distance between Nodes of BST : Solved Sorted Permutation Rank : Solved 0/1 String : Solved Implement StrStr : Unsolved Number of Hosts per Subnet : Unsolved Distribute candies : Solved Next Greater Circular Array! : Unsolved Longest Subarray Length : Solved Shortest Distance in a graph with two d : Solved Spider's Web : Unsolved Meeting rooms : Solved MATH_BUG01 : Solved Minimum Number of Refueling Stops : Unsolved NESTED_CMPL : Solved maximum sum of array with no repeating : Unsolved Palindromic Substrings Count : Unsolved Micro and Lucky Tree : Unsolved Sort stack using another stack : Solved Merge Overlapping Intervals : Unsolved Max Product Subarray : Solved Clone a linked list : Solved Longest Palindromic Subsequence : Solved ARRAY_BUG : Solved Valid Number : Solved Balanced Binary Tree : Solved Numbers with most occurences : Solved Prime Numbers : Solved Paint House! : Solved TEMPLATES : Solved Transpose File : Solved Size three subsequences divisible by B : Unsolved Chocolate Distribution : Unsolved Subarrays with B Different Integers : Solved Find Rectangle in binary matrix : Unsolved EDIBLE STRINGS : Unsolved Next Greater Circular Array! : Solved Job Sequencing : Solved Another Coin Problem : Solved Number of Hosts per Subnet : Solved NESTED_CMPL2 : Solved Thread : Solved QUIRKS MODE : Unsolved Convert an arbitrary Binary Tree to a t : Solved maximum sum of array with no repeating : Solved Spinning Disc's Direction : Solved Count Delete : Solved Spinning Disc's Direction : Unsolved Jelly Beans Jars : Solved Treasure Hunt : Unsolved GCD_CMPL : Unsolved Color of the last ball : Unsolved Maximum Depth : Unsolved Repeat and Missing Number Array : Solved Equilateral Triangles using Toothpicks : Solved Distinct Primes : Solved Convert to Palindrome : Unsolved Swap List Nodes in pairs : Unsolved Palindrome Partitioning : Solved Good Subarrays : Unsolved Micro and Lucky Tree : Solved Max Sum Without Adjacent Elements : Solved Divide the Cake : Solved Measure Time by Burning Ropes : Unsolved One Mile on the Globe : Unsolved Egg Drop Problem! : Unsolved First Repeating element : Unsolved Maximum difference between two elements : Unsolved Color of the last ball II : Unsolved World Trips : Solved Genie and Hats : Solved Going back to OS : Solved Min Steps in Infinite Grid : Unsolved Measure Time by Hourglass : Solved Arrange Cubes : Solved Activity Selection : Unsolved Is Rectangle? : Solved Cats and a Square : Solved Thread : Unsolved Maximum Depth : Solved Transpose File : Unsolved Substring Concatenation : Solved Excel Column Title : Unsolved Distribute in Circle! : Unsolved EDIBLE STRINGS : Solved Allocate Books : Solved Activity Selection : Solved Make a Statement : Solved Helium Balloon : Solved Two Numbers : Solved LONGEST COMMON SUBSTRING : Unsolved Container With Most Water : Unsolved Min Elevator Trips : Unsolved Diffk II : Solved Flip Counter : Solved Minimum Number of Refueling Stops : Solved Helium Balloon : Unsolved Good Subarrays : Solved RECTANGLE SUM : Unsolved Triplets with Sum between given range : Unsolved Number of sextuplets (or six values) th : Solved Train Station : Solved Max Product Subarray : Unsolved Sum binary tree or not : Solved Palindrome Partitioning II : Solved Word Break : Unsolved First Repeating element : Solved Good Processor : Unsolved Quarters on a Table : Solved Divisor Sequences : Solved Divide Gold Bar : Unsolved Best Time to Buy and Sell Stocks II : Solved Maximum difference between two elements : Solved Next Number : Solved Gates of Heaven : Solved Find Rectangle in binary matrix : Solved Ways to make array non decreasing : Unsolved Cross the Bridge II : Solved BALLS IN BOXES : Unsolved Color of the last ball : Solved Measure Milk by Cans : Solved Binary Tree Paths : Unsolved Seats : Solved World Trips : Unsolved Rook Movement : Unsolved Blindfolded Coin Toss : Unsolved Blindfolded Coin Toss : Solved Knight On Chess Board : Solved Evaluate Expression To True : Unsolved Celebrity Problem : Unsolved Maximum level sum : Solved Six Colored Cubes : Unsolved Last Palindromic Date : Unsolved Last Palindromic Date : Solved Binary Tree Paths : Solved Cats and a Square : Unsolved RECTANGLE SUM : Solved Next Number II : Unsolved Longest path in a subtree : Unsolved Square Root of Integer : Solved Reverse Bits : Solved Remove Duplicate Letters : Solved Reverse Alternate K Nodes : Unsolved City Tour : Solved LONGEST COMMON SUBSTRING : Solved Capture Regions on Board : Unsolved Roads and Libraries : Unsolved Find a peak element : Solved Bee Travel : Unsolved Two Numbers : Unsolved Find the Defective Ball II : Unsolved Pick from both sides! : Unsolved Distinct Subsequences : Solved Palindromic Substrings Count : Solved Compare Version Numbers : Unsolved Matrix Search : Unsolved One Mile on the Globe : Solved Combination Sum : Unsolved EZPZ : Solved Deterministic Finite Automaton : Unsolved Deterministic Finite Automaton : Solved Scores : Solved Longest Common Subsequence : Unsolved Trailing Zeros in Factorial : Solved Byes : Unsolved Trailing Zeroes : Unsolved Ten Black and White Socks : Unsolved Distinct Initial Matrices : Solved Rook Movement : Solved Region in BinaryMatrix : Unsolved Maximum Sum Triplet : Unsolved Flip Array : Solved Cross the Bridge II : Unsolved PRETTYPRINT : Unsolved Points on the Straight Line : Unsolved Minimum cost to connect cities : Unsolved BALLS IN BOXES : Solved Ants on a Triangle : Unsolved Tiling With Dominoes : Solved Chocolate Distribution : Solved Design Messenger : Unsolved Common Nodes in Two Binary Search Trees : Solved Celebrity Problem : Solved DEVICE CROSSOVER : Solved Remove Invalid Parentheses : Unsolved Burst Balloons : Unsolved Max Sum Contiguous Subarray : Solved Ways to make array non decreasing : Solved Min Stack : Solved Minimum cost to connect cities : Solved Sort List : Unsolved Increasing SubArrays : Solved Design URL Shortener Remove Element from Array : Solved Evaluate Expression : Solved Remove Invalid Parentheses : Solved Find Permutation : Solved Cross the Bridge : Unsolved Divide Gold Bar : Solved Burst Balloons : Solved Distinct Initial Matrices : Unsolved Shortest Path in Simple Graph : Unsolved Dinner Hand Shakes : Unsolved Longest path in a subtree : Solved Subarray with equal occurences! : Unsolved Next Similar Number : Unsolved Modular Expression : Solved Dinner Hand Shakes : Solved Transform CSV : Solved List Cycle : Solved Increasing SubArrays : Unsolved Get Mode Array Updates : Unsolved PRODDISC : Unsolved Min Jumps : Unsolved Min Jumps : Solved Reverse pairs : Unsolved Byes : Solved Valid Path : Solved Marbles in Jar : Unsolved NEIGH : Unsolved Valid Binary Search Tree : Unsolved Prisoners and Poison : Solved WoodCutting Made Easy! : Unsolved Power of 3 : Unsolved Max Chunks To Make Sorted : Solved Profit Maximisation : Unsolved Count Total Set Bits : Unsolved Gcd Ordering : Unsolved The Ghost Type : Unsolved Build Identical Trees : Solved Tree coloring with three colors : Unsolved Equal Tree Partition : Unsolved Decode String : Unsolved Largest BST Subtree : Unsolved Treasure Hunt : Solved Transform CSV : Unsolved Number of 1 Bits : Unsolved Genie and Hats : Unsolved Reverse the String : Unsolved IIFE : Solved Coin Sum Infinite : Unsolved Valid BST from Preorder : Unsolved Grep : Solved Palindrome Pairs : Unsolved Ways to form Max Heap : Unsolved PRODDISC : Solved Max Continuous Series of 1s : Unsolved Fraction : Solved The Ghost Type : Solved Decode String : Solved Node distance C in binary tree : Unsolved Unique Binary Search Trees II : Solved Rain Water Trapped : Unsolved Pattern Printing -2 : Unsolved ITS TIME FOR SOME DBMS : Unsolved Magician and Chocolates : Unsolved Power of 3 : Solved Path Sum : Unsolved Next Number II : Solved Add Two Numbers as Lists : Unsolved Vertical Order traversal of Binary Tree : Unsolved Shortest Distance in a Maze : Unsolved WHILE_CMPL : Unsolved Shortest Distance in a Maze : Solved Highly Consistent Database : Solved Profit Maximisation : Solved Balance Array : Unsolved Ugly Pairs : Unsolved Find Duplicate in Array : Solved Longest Consecutive Sequence : Unsolved Tree coloring with three colors : Solved Search in a row wise and column wise so : Unsolved Minimum Difference Subsets! : Solved List Cycle : Unsolved Sub-matrix Sum Queries : Unsolved Node distance C in binary tree : Solved Combine Maximum : Solved N max pair combinations : Solved Deepu and girlfriend : Unsolved KEEP SWAPPING 2 : Unsolved Longest Subarray Difference : Solved Identical Binary Trees : Unsolved FRUIT PACKETS : Unsolved Matrix Permutation : Unsolved Are they same - I : Solved Bus and Passenger : Unsolved Ugly Pairs : Solved Pattern Printing -2 : Solved Cut the rod : Unsolved Quarters on a Table : Unsolved LOOP_CMPL2 : Unsolved Balanced Parantheses! : Solved Shortest Distance from All Buildings : Unsolved Minimum Cost to Hire K Workers : Unsolved ZigZag Level Order Traversal BT : Solved Atoi : Solved Pascal Triangle : Unsolved Useful Extra Edges : Solved Single Element in a Sorted Array : Solved Sub-matrix Sum Queries : Solved Tushar's Birthday Party : Solved Sorted Insert Position : Unsolved Ways to form Max Heap : Solved K DISTANCE : Unsolved Kingdom War : Unsolved Bus and Passenger : Solved Solve sub-sequences and return OR : Solved Time Based Key-Value Store : Unsolved CHOOSE1 : Unsolved Permutation Swaps! : Solved Marbles in Jar : Solved Design Linked list : Unsolved Grep Log : Solved REC_CMPL3 : Unsolved NEIGH : Solved Palindrome Pairs : Solved Highly Consistent Database : Unsolved Pattern Printing -1 : Unsolved Shortest Distance from All Buildings : Solved Bee Travel : Solved Regular Expression Match : Solved EZPZ : Unsolved Design Twitter Remove Duplicates from Sorted Array : Solved Design Search Typeahead Delete Edge! : Unsolved Hotel Reviews : Unsolved Count of rectangles with area less than : Solved Ratio of Boys and Girls : Solved N max pair combinations : Unsolved Find subsequence : Unsolved Fastest Horses : Solved Remove Duplicates from Sorted List : Solved MIN MAX RIDDLE : Unsolved LOOP_CMPL : Solved Generate all Parentheses II : Solved 2-Sum Binary Tree : Solved Stringoholics : Unsolved Sum of all Submatrices : Unsolved Left view of binary tree : Unsolved ADD OR NOT : Unsolved Length of longest consecutive ones : Solved NESTED_CMPL2 : Unsolved Kth Node From Middle : Unsolved Grep Log : Unsolved Deepu and girlfriend : Solved Pattern Printing -1 : Solved Sum of all Submatrices : Solved Intersecting Chords in a Circle : Unsolved Max Distance : Unsolved Cousins in Binary Tree : Unsolved Hotel Bookings Possible : Solved Consecutive Numbers Sum : Solved Good Processor : Solved Max Non Negative SubArray : Solved WINNER NAME : Unsolved Shortest Path in Simple Graph : Solved Highly Available Database Tenth Line : Unsolved ADD OR NOT : Solved Fake Note : Unsolved Valid Sudoku : Unsolved Lines in a given range : Solved Palindrome String : Unsolved Best Time to Buy and Sell Stocks I : Unsolved LOOP_CMPL : Unsolved Divisibility by 8 : Unsolved Preorder Traversal : Unsolved Consecutive Number Sum : Solved Count Right Triangles : Unsolved Equal Average Partition : Unsolved Pairs With Given Xor : Unsolved Rotate List : Unsolved Design Cache : Solved Best Time to Buy and Sell Stocks I : Solved Divide the Cake : Unsolved Smallest Subarray : Unsolved Measure Time by Hourglass : Unsolved Coins in a Line : Unsolved REC_CMPL2 : Unsolved All Factors : Unsolved SUBTRACT : Unsolved Actors and their Movies : Solved Path in Directed Graph : Unsolved Boundary Traversal Of Binary Tree : Solved Justified Text : Unsolved Accessibility : Solved Longest valid Parentheses : Solved Equal : Unsolved Sum of minimum and maximum elements of : Unsolved MIN MAX RIDDLE : Solved 132 Pattern : Unsolved Next Greater Number BST : Unsolved Divisibility by 8 : Solved IIFE : Unsolved Compute nCr % m : Unsolved WINNER NAME : Solved Max Min : Solved Design Cache : Unsolved Rearrange the array : Unsolved Max Chunks To Make Sorted II : Unsolved Maximum Sum Triplet : Solved LEFTOVER : Unsolved LEFTOVER : Solved Eggs and Building : Unsolved All Unique Permutations : Unsolved Order them : Unsolved Accessibility : Unsolved Min Stack : Unsolved Sum of divisor of N factorial : Unsolved Regular Expression II : Unsolved Cousins in Binary Tree : Solved Valid Ip Addresses : Unsolved Insertion Sort List : Unsolved Try some SQL : Unsolved Stairs : Solved Total Moves For Bishop! : Unsolved Count Right Triangles : Solved Sharding a Database : Solved Find the Defective Ball : Unsolved Permutation Swaps! : Unsolved Single Number II : Solved Largest area of rectangle with permutat : Unsolved Water Flow : Solved Compute nCr % m : Solved BST nodes in a range : Unsolved Subarray Sum Equals K : Unsolved Count the primes : Unsolved Noble Integer : Solved Parity Queries : Unsolved Justified Text : Solved Allocate Books : Unsolved MinimiZe : Solved Bulbs : Unsolved Remove Duplicates from Sorted Array II : Solved ITS TIME FOR SOME DBMS : Solved 132 Pattern : Solved Mod Sum : Unsolved Modular Expression : Unsolved Shortest Unique Prefix : Unsolved Rearrange the array : Solved SUBTRACT : Solved Step by Step : Unsolved Best Time to Buy and Sell Stock with Co : Unsolved Kth Smallest Element In Tree : Unsolved Maximum array sum after B negations : Unsolved Best Time to Buy and Sell Stock atmost : Solved Highest Product : Solved 3 Length Paths : Solved Remove the Substring : Unsolved Longest Subarray Difference : Unsolved Patch the tire : Solved Word Ladder I : Solved Sharding a Database : Unsolved Painter's Partition Problem : Solved ODD SUM : Unsolved Remove Nth Node from List End : Solved Minimum Paratheses! : Unsolved Highest Product : Unsolved Level Order : Unsolved 100 People in a Circle : Solved Order them : Solved Try some SQL : Solved Longest Palindromic Subsequence : Unsolved Check two bracket expressions : Solved K DISTANCE : Solved Ways to color a 3xN Board : Unsolved Sudoku : Solved Maximum array sum after B negations : Solved Minimum Paratheses! : Solved Different Bits Sum Pairwise : Unsolved JAVASCRIPT TAG : Solved Leaders in an array : Solved Sum of divisor of N factorial : Solved ODD SUM : Solved Something on IP's : Unsolved Best Time to Buy and Sell Stock with Co : Solved CHOOSE2 : Solved Sort by Frequency : Unsolved Parity Queries : Solved Subarray Sum Equals K : Solved MODIFIED SEARCH : Unsolved Find the Defective Ball : Solved Design URL Shortener : Solved Compute nCr % p : Unsolved JAVASCRIPT TAG : Unsolved 3 Length Paths : Unsolved The Tribe : Unsolved Minimum operations of given type to mak : Unsolved Mod Sum : Solved Increasing Path in Matrix : Unsolved LRU Cache : Unsolved Binary Representation : Solved The Sequence game : Solved Finding Position : Solved Next Greater Number BST : Solved Design URL Shortener : Unsolved Word Ladder II : Unsolved Steps to get out of complete binary tre : Unsolved Maximum Rectangle : Unsolved Find duplicate rows in a binary matrix : Solved Prime Subarrays : Unsolved Prime Subarrays : Solved Wizards and Drawves : Solved Compute nCr % p : Solved Find subsequence : Solved MinimiZe : Unsolved Difference between odd and even level : Unsolved GREEDY PICK : Unsolved Black Shapes : Solved First Missing Integer : Unsolved Dungeon Princess : Unsolved N digit numbers with digit sum S : Solved Convert the amount in number to words : Solved Search for a Range : Unsolved Merge elements : Unsolved Breaking Chocolate Bars : Solved Array and Prime Divisors : Unsolved Kingdom War : Solved MODIFIED SEARCH : Solved K reverse linked list : Unsolved Simplify Directory Path : Solved Light Switches in the Cellar : Unsolved Grep : Unsolved Smallest Subarray : Solved Best Time to Buy and Sell Stock with Tr : Unsolved REMOVE DUPLICATES : Unsolved Rotated Arrays : Unsolved CHOOSE3 : Solved Zigzag String : Unsolved Six Colored Cubes : Solved Two out of Three : Solved Starting indices of the substrings in s : Solved Into Blocks : Unsolved Balanced Brackets Queries : Unsolved Max Chunks To Make Sorted II : Solved Array and Prime Divisors : Solved Maximum Rectangle : Solved Random Attendance : Unsolved Matrix Permutation : Solved Recover Binary Search Tree : Unsolved Delete Edge! : Solved GREEDY PICK : Solved BST Iterator : Solved Another chocolate game : Solved REMOVE DUPLICATES : Solved Next Pointer Binary Tree : Unsolved Partitions : Solved Ways to Decode : Unsolved Common Nodes in Two Binary Search Trees : Unsolved Sort List : Solved Build Identical Trees : Unsolved Largest Continuous Sequence Zero Sum : Solved Remove K Digits : Unsolved Inorder Traversal : Solved Longest Common Prefix II : Solved Something on IP's : Solved Difference between odd and even level : Solved Convert Integer To Roman Number : Solved Number of Squareful Arrays : Solved Into Blocks : Solved Jelly Beans Jars : Unsolved Subsets II : Solved Convert the amount in number to words : Unsolved Regular Expression Match : Unsolved Check Palindrome! : Unsolved Kth Permutation Sequence : Solved Populate Next Right Pointers Tree : Unsolved Best Time to Buy and Sell Stock with Tr : Solved TOP VIEW : Solved Stairs : Unsolved Fake Note : Solved Random Attendance : Solved Maximum Frequency stack : Unsolved Balanced Brackets Queries : Solved Diameter of Binary Tree : Unsolved Large Factorial : Solved Maximum Longest Common Subsequence : Unsolved Maximum Longest Common Subsequence : Solved Get Mode Array Updates : Solved Longest Common Prefix II : Unsolved Remove K Digits : Solved Anagram Substring Search : Unsolved ARRAY_BUG : Unsolved Light Switches in the Cellar : Solved Vowels : Solved Commutable Islands : Unsolved Construct Binary Tree From Inorder And : Solved Rotated Arrays : Solved NEXTGREATER : Unsolved NUMRANGE : Solved 0-1 Knapsack : Unsolved K-th character of decrypted string : Solved Reverse integer : Solved Measure Time by Burning Ropes : Solved Substring Concatenation : Unsolved Swap Forward And Backward Slash : Unsolved Word Ladder II : Solved Heater and Houses : Unsolved Equal : Solved Train Station : Unsolved Spiral Order Matrix II : Unsolved Merge Two BSTs : Unsolved First Scheduler : Unsolved Sort an array according to the order de : Unsolved Diameter of Binary Tree : Solved B XOR : Unsolved Ways to color a 3xN Board : Solved Count Permutations of BST : Solved Anagram Substring Search : Solved Add Binary Strings : Unsolved Remove Punctuations : Unsolved Longest Increasing Subsequence : Unsolved Sorted Array To Balanced BST : Unsolved Reverse Linked List : Solved Count of pairs with the given sum II : Unsolved Count Element Occurence : Solved Spider's Web : Solved Greatest Common Divisor : Unsolved Maximum Path in Triangle : Solved Scores : Unsolved Maximum level sum : Unsolved Burn a Tree : Solved Valid Ip Addresses : Solved Verify Prime : Solved Maximum coin in a tree : Unsolved Sort by Frequency : Solved Maximum Frequency stack : Solved Count the primes : Solved Merge K Sorted Lists : Unsolved B XOR : Solved Max Sum Path in Binary Tree : Unsolved Count of pairs with the given sum II : Solved ARRAY_IMPL1 : Solved Evaluate Expression To True : Solved Make a Statement : Unsolved Reduce the string : Unsolved The square game : Unsolved Sort an array according to the order de : Solved MATH_BUG01 : Unsolved Merge Two BSTs : Solved Aggressive cows : Solved Minimum Swaps 2 : Solved Reverse pairs : Solved Three Numbers : Solved Find duplicate rows in a binary matrix : Unsolved All Factors : Solved Power of 2 : Solved First Scheduler : Solved Path in Directed Graph : Solved Heater and Houses : Solved Substring Game : Unsolved Excel Column Number : Solved Convert Integer To Roman Number : Unsolved REC_CMPL2 : Solved Lines in a given range : Unsolved Leaf nodes from Preorder of a Binary Se : Unsolved SUMMATION : Unsolved Max Depth of Binary Tree : Solved SUMMATION : Solved Longest Increasing Subsequence : Solved Design Search Typeahead : Solved Intersecting Chords in a Circle : Solved Next Permutation : Unsolved Valid BST from Preorder : Solved Maximum Product Increasing Subsequence : Unsolved Pretty Json : Solved Meeting rooms : Unsolved Box Stacking Problem : Unsolved Check divisibility by 7 : Unsolved The square game : Solved REVERSE OR NOT : Unsolved Smallest Good Base : Unsolved Maximum Unsorted Subarray : Unsolved Queen Attack : Solved AMORTIZED1 : Unsolved Delete and Conquer : Unsolved Duplicates in binary tree : Solved Maximum coin in a tree : Solved Check divisibility by 7 : Solved Too Odd to be a Palindrome : Unsolved Leaders in an array : Unsolved Longest Subarray Sum B : Unsolved In an array : Unsolved Task Scheduler : Unsolved Assign Mice to Holes : Solved Design Search Typeahead : Unsolved Median of stream of running integers : Solved PRETTYPRINT : Solved Minimum Difference Subsets! : Unsolved Queries On A Tree : Unsolved Remove Punctuations : Solved Count of paths in a grid : Solved Boundary Traversal Of Binary Tree : Unsolved Leaf nodes from Preorder of a Binary Se : Solved Rotate Matrix : Unsolved CHOOSE2 : Unsolved CHOOSE3 : Unsolved LCA of array : Unsolved Too Odd to be a Palindrome : Solved Redundant Braces : Solved Tiling Problem : Unsolved Delete and Conquer : Solved 2-Sum Binary Tree : Unsolved Travelling Saleman Problem : Solved Remove Half Nodes : Solved Clone Graph : Solved Bob and Queries : Unsolved REVERSE OR NOT : Solved Paint House! : Unsolved Number Of Open Doors : Solved Palindrome Partitioning : Unsolved 3 Numbers : Unsolved Smallest Good Base : Solved Function : Unsolved Smallest XOR Queries : Unsolved Smallest sequence with given Primes : Solved Falling Squares : Solved Queries On A Tree : Solved Design Twitter : Solved 100 People in a Circle : Unsolved Subarray with equal occurences! : Solved Required Substrings : Unsolved Sum of pairwise Hamming Distance : Unsolved Longest Subarray Length : Unsolved Merge K sorted arrays! : Unsolved Reduce the string : Solved K reverse linked list : Solved Window String : Unsolved Shortest common superstring : Unsolved Daughters' Ages : Unsolved Two teams? : Solved Power Of Two Integers : Solved Sub Matrices with sum Zero : Solved Sliding Window Maximum : Unsolved Design Twitter : Unsolved Intersection of Two Lines : Unsolved N/3 Repeat Number : Solved Find sub-array with the given sum : Unsolved TOP VIEW : Unsolved Insertion Sort List : Solved Maximum Product Increasing Subsequence : Solved Bob and Queries : Solved 3 Numbers : Solved Sum of adjacent elements is always even : Unsolved Substring Game : Solved Integer To Roman : Solved Function : Solved B-th Smallest Prime Fraction : Unsolved Tiling Problem : Solved Very Hard Queries : Unsolved Square Root of Integer : Unsolved Implement StrStr : Solved Postorder Traversal : Unsolved Add Binary Strings : Solved Intersection of Two Lines : Solved Invert the Binary Tree : Unsolved In an array : Solved Carotenemia : Unsolved Carotenemia : Solved Required Substrings : Solved Best Time to Buy and Sell Stock atmost : Unsolved Tenth Line : Solved Count of pairs with the given sum : Solved Smallest XOR Queries : Solved Check if each internal node of a BST ha : Unsolved Max Sum Path in Binary Tree : Solved Unique Binary Search Trees : Solved Rotated Array : Unsolved Highly Available Database : Solved Assign Mice to Holes : Unsolved Combinations : Solved Difference of Candies : Unsolved LCA of array : Solved Regular Expression II : Solved Useful Extra Edges : Unsolved Identical Binary Trees : Solved Minimum Parantheses! : Unsolved Roads and Libraries : Solved Size three subsequences divisible by B : Solved CHOOSE4 : Solved Highly Available Database : Unsolved Highly Consistent Database Best Time to Buy and Sell Stocks II : Unsolved Edit Distance : Solved Minimum Bracket Reversals : Solved Rotated Array : Solved Min XOR value : Unsolved Medicine Chest on a Boat : Solved Power of 2 : Unsolved Floyd Warshall Algorithm : Unsolved Difference between odd and even levels : Unsolved Design Linked list : Solved First non-repeating character in a stre : Solved Min Sum Path in Triangle : Unsolved Multiplication of previous and next : Unsolved Unique Paths in a Grid : Unsolved Find sub-array with the given sum : Solved Partition List : Solved Produce the number : Unsolved Difference of Candies : Solved Two teams? : Unsolved Add One To Number : Unsolved Minimum Absolute Difference : Solved Produce the number : Solved Array with consecutive elements : Solved Sum Of Fibonacci Numbers : Solved Smallest Missing Sum! : Unsolved Inorder Traversal of Cartesian Tree : Solved Longest Substring Without Repeat : Unsolved Two Pills each day : Solved Combinations : Unsolved Find nth Magic Number : Solved Multiplication of previous and next : Solved Sum of adjacent elements is always even : Solved Minimum swaps required to bring all ele : Unsolved Smaller or equal elements : Unsolved Row with maximum number of ones : Unsolved Egg Drop Problem! : Solved Vowel and Consonant Substrings! : Unsolved Elements which have at-least two greate : Unsolved Delete middle node of a Linked List : Unsolved Row with maximum number of ones : Solved Infix to Postfix : Solved Min Depth of Binary Tree : Solved Find the closest pair from two sorted a : Unsolved Minimum Absolute Difference : Unsolved Floyd Warshall Algorithm : Solved Move all zeroes to end of the array : Solved Search in Bitonic Array! : Solved Kth Smallest Element in the Array : Unsolved Triplets with Sum between given range : Solved Duplicates in binary tree : Unsolved Max Rectangle in Binary Matrix : Unsolved Length of longest palindromic list : Unsolved Count Palindromic Subsequences : Unsolved Move all zeroes to end of the array : Unsolved Falling Dominoes : Solved Min Steps in Infinite Grid : Solved Find the closest pair from two sorted a : Solved Difference between odd and even levels : Solved Remove Duplicate Letters : Unsolved String representation using its substri : Unsolved Find The Next : Unsolved Longest Consecutive Sequence in Binary : Solved Dijsktra : Unsolved Number of Squareful Arrays : Unsolved Unique Paths III : Unsolved Longest Pallindromic Subsequence : Unsolved Word Break II : Solved Delete middle node of a Linked List : Solved Check if each internal node of a BST ha : Solved Longest Substring Without Repeat : Solved Color of the Bear : Unsolved FRUIT PACKETS : Solved BST nodes in a range : Solved Merge Two Sorted Arrays : Unsolved Min Elevator Trips : Solved Simplify Directory Path : Unsolved Find nth Magic Number : Unsolved Smallest Missing Sum! : Solved Finding Position : Unsolved Steps to get out of complete binary tre : Solved INFINITE STRING : Unsolved 0/1 String : Unsolved Queen Attack : Unsolved Order of People Heights : Solved Monkeys and Doors : Solved Simple Queries : Solved Longest Palindromic Substring : Unsolved Cows and snacks : Unsolved Dijsktra : Solved Day of the week : Unsolved Unique Paths III : Solved Swap Forward And Backward Slash : Solved Longest Pallindromic Subsequence : Solved Falling Dominoes : Unsolved Minimum Cost to Hire K Workers : Solved Detect and Remove Loop from a linked li : Unsolved B Closest Points to Origin : Solved Number of Digit One : Unsolved Equal Tree Partition : Solved Reverse integer : Unsolved Deserialize Binary Tree : Unsolved Find if there is a sub-array with 0 sum : Solved Length of Last Word : Unsolved Merge Intervals : Unsolved Majority Element : Unsolved Maximum height of the staircase : Unsolved Maximum height of the staircase : Solved Find if two rectangles overlap : Unsolved Find if two rectangles overlap : Solved Number Of Open Doors : Unsolved Number of Digit One : Solved Rectangle Area : Solved Count of pairs with the given sum : Unsolved Count of divisors for multiple queries : Unsolved Count of divisors for multiple queries : Solved Product array puzzle : Unsolved Product array puzzle : Solved Recover Binary Search Tree : Solved String representation using its substri : Solved Counting Subarrays! : Unsolved Unreliable Rover : Unsolved DIVISIONS : Unsolved Count of smaller numbers after self : Solved Cows and snacks : Solved Count of Range Sum : Solved Maximum Difference : Unsolved Maximum Difference : Solved Inversion count in an array : Unsolved Subarrays with distinct integers! : Solved Lightsabers : Unsolved Lightsabers : Solved Check two bracket expressions : Unsolved Preimage Size of Factorial Zeroes Funct : Unsolved Three Numbers : Unsolved Merge Two Sorted Arrays : Solved Max Rectangle in Binary Matrix : Solved Maximum Sum Square SubMatrix : Solved Length of longest palindromic list : Solved Combination Sum II : Solved Find pairs in array whose sum is alread : Unsolved Find pairs in array whose sum is alread : Solved Count pairs in array whose sum is divis : Solved Length of Longest Subsequence : Solved Unreliable Rover : Solved Is given level order a BST? : Unsolved B-th Smallest Prime Fraction : Solved Detect and Remove Loop from a linked li : Solved Rotten Oranges : Unsolved Grid Illumination : Unsolved Grid Illumination : Solved Coins in a Line : Solved INFINITE STRING : Solved Remove nodes from Path sum less than B : Unsolved Check if given Preorder, Inorder and Po : Unsolved Count of smaller numbers after self : Unsolved Kth Manhattan Distance Neighbourhood : Solved Best Time to Buy and Sell Stocks III : Solved Rotten Oranges : Solved Tushar's Birthday Bombs : Unsolved Connect ropes with minimum length : Unsolved kth character in double decrypted strin : Unsolved Check for BST with exactly one child of : Unsolved Preimage Size of Factorial Zeroes Funct : Solved kth character in double decrypted strin : Solved Deserialize Binary Tree : Solved Check for BST with exactly one child of : Solved Combination Sum II : Unsolved Longest Common Pallindromic Subsequence : Unsolved Find a peak element : Unsolved Remove nodes from Path sum less than B : Solved Reverse Bits : Unsolved Median of Array : Solved Number of islands : Unsolved Eggs and Building : Solved Gas Station : Solved Reverse String : Unsolved Diffk : Unsolved Lexographically Greater Strings : Solved Pairs With Given Xor : Solved Balanced Parantheses! : Unsolved Max Depth of Binary Tree : Unsolved Remove_k _ Digits : Unsolved SUBARRAY OR : Unsolved Is given level order a BST? : Solved H-index : Unsolved Minimise the maximum difference between : Unsolved Ways to Decode : Solved Connect ropes with minimum length : Solved Monkeys and Doors : Unsolved Longest Subarray Sum B : Solved Longest Palindromic Substring : Solved Number of islands : Solved Minimum Swaps 2 : Unsolved Check if given Preorder, Inorder and Po : Solved Intersection of Linked Lists : Unsolved Most Stones Removed : Solved FAMOUS PRODUCT : Unsolved Custom Sort String : Unsolved Longest Common Pallindromic Subsequence : Solved Count of Range Sum : Unsolved Aggressive cows : Unsolved Largest Permutation : Unsolved Cycle in Directed Graph : Unsolved Rectangle Area : Unsolved Custom Sort String : Solved N integers containing only 1,2 and 3 : Solved Maximum Sum Combinations : Solved First negative integer in window size B : Unsolved First negative integer in window size B : Solved Reversing the first B elements of queue : Unsolved Reversing the first B elements of queue : Solved Most Stones Removed : Unsolved All Unique Permutations : Solved N integers containing only 1,2 and 3 : Unsolved Max edge queries! : Solved Another Coin Problem : Unsolved Nearest Smaller Element : Unsolved Merge Two Sorted Lists : Unsolved FAMOUS PRODUCT : Solved H-index : Solved Numbers of length N and value less than : Solved Minimum Size Subarray Sum : Unsolved Reorder List : Unsolved Minimum Size Subarray Sum : Solved Obsessive String : Unsolved Wave Array : Unsolved Sorted Insert Position : Solved Print all root to leaf paths : Unsolved Ants on a Triangle : Solved Count of rectangles with area less than : Unsolved Time Based Key-Value Store : Solved Distance of nearest cell having 1 in a : Unsolved REDUCTION : Unsolved ALL GCD : Solved Print all root to leaf paths : Solved Maximum Absolute Difference : Solved Median of Array : Unsolved Next Number : Unsolved Sum Of Fibonacci Numbers : Unsolved Path with good nodes! : Solved Rat In a Maze : Unsolved Subarray with given XOR : Unsolved Single Element in a Sorted Array : Unsolved Multiply Strings : Unsolved ALL GCD : Unsolved Jesse and two string : Unsolved Obsessive String : Solved Ratio of Boys and Girls : Unsolved Capture Regions on Board : Solved N/3 Repeat Number : Unsolved Make it : Unsolved Populate Next Right Pointers Tree : Solved Two Strings : Solved Hotel Reviews : Solved Largest Number : Solved Pair With Given Difference : Unsolved Length of Longest Subsequence : Unsolved Distance of nearest cell having 1 in a : Solved Day of the week : Solved Sum of minimum and maximum elements of : Solved Make it : Solved Multiple left rotations of the array : Unsolved Max Continuous Series of 1s : Solved Rat In a Maze : Solved Prime Sum : Unsolved Vertex Cover Problem : Unsolved Color of the Bear : Solved Serialize Binary Tree : Unsolved Longest Consecutive Sequence : Solved Generate all Parentheses : Solved Minimum Weight Cycle in an Undirected w : Solved Strobogrammatic Number III : Unsolved Kth Row of Pascal's Triangle : Unsolved Jesse and two string : Solved REDUCTION : Solved Minimum swaps required to bring all ele : Solved Left view of binary tree : Solved Path to Given Node : Solved Array with consecutive elements : Unsolved Array 3 Pointers : Solved Swap List Nodes in pairs : Solved Vertex Cover Problem : Solved K Largest Elements : Solved Sum Root to Leaf Numbers : Solved Subsets II : Unsolved NESTED_CMPL : Unsolved Sharding a Database Strobogrammatic Number III : Solved Serialize Binary Tree : Solved Diffk II : Unsolved Sort Binary Linked List : Unsolved B Closest Points to Origin : Unsolved Snake Ladder Problem! : Unsolved Maximise the coins by popping balloons : Solved REC_CMPL1 : Solved Convert an arbitrary Binary Tree to a t : Unsolved DIVISIONS : Solved LAST SUBSET PROBLEM : Unsolved LAST SUBSET PROBLEM : Solved Check whether the graph is bipartide or : Unsolved Array 3 Pointers : Unsolved Minimum Weight Cycle in an Undirected w : Unsolved Fastest Horses : Unsolved Movie Character : Solved NESTED_CMPL3 : Unsolved Alternate positive and negative element : Solved Single Number II : Unsolved Gcd Ordering : Solved Window String : Solved Reverse a stack using recursion : Unsolved Alternate Lower Upper Sort : Solved Reverse Alternate K Nodes : Solved Order of People Heights : Unsolved Trees and Sum of Distances : Unsolved Amazing Subarrays : Solved Smaller or equal elements : Solved ALL GCD PAIR : Unsolved Check Palindrome! : Solved Min Cost Path : Solved String count : Unsolved Shortest Distance in a graph with two d : Unsolved Check whether the graph is bipartide or : Solved KEEP SWAPPING 2 : Solved TRIPLET OF AND : Unsolved Remove Duplicates from Sorted List II : Solved Min Sum Path in Matrix : Unsolved Min Sum Path in Triangle : Solved Search in a row wise and column wise so : Solved AMORTIZED1 : Solved MINIMIZE THE XOR : Solved K Largest Elements : Unsolved Strongly Connected Components : Unsolved Strongly Connected Components : Solved Bridges in a graph : Unsolved Bridges in a graph : Solved Matrix Median : Solved String count : Solved Next Similar Number : Solved Toeplitz Matrix : Unsolved Merge Intervals : Solved Trees and Sum of Distances : Solved Subset Sum Problem! : Unsolved Minimum Appends for Palindrome! : Solved Trailing Zeroes : Solved Knight On Chess Board : Unsolved Chain of Pairs : Solved Smallest Multiple With 0 and 1 : Solved Sum Root to Leaf Numbers : Unsolved SUM OF SQUARES : Unsolved SUM OF SQUARES : Solved Intersection of Linked Lists : Solved Actors and their Movies : Unsolved Cross the Bridge : Solved XOR TRIPLETS : Unsolved Maximum Edge Removal : Unsolved Minimum number of swaps required for ar : Solved Two Pills each day : Unsolved Pair With Given Difference : Solved Largest Permutation : Solved ALL GCD PAIR : Solved Smallest Subtree with all the Deepest N : Unsolved Smallest Subtree with all the Deepest N : Solved Cut the rod : Solved TRIPLET OF AND : Solved Count And Say : Unsolved Find Permutation : Unsolved Toeplitz Matrix : Solved INVERSIONS : Unsolved Travelling Saleman Problem : Unsolved FizzBuzz : Solved Minimum number of swaps required for ar : Unsolved Kth Smallest Element in a Sorted Matri : Unsolved Maximum product of an increasing subseq : Solved Length of Longest Fibonacci Subsequence : Unsolved Length of Longest Fibonacci Subsequence : Solved Maximum Points on the same line : Solved Search in Bitonic Array! : Unsolved Matrix Chain Multiplication : Unsolved Matrix Chain Multiplication : Solved Russian Doll Envelopes : Unsolved Distinct Primes : Unsolved Valid Binary Search Tree : Solved Max Chunks To Make Sorted : Unsolved Interleaving Strings : Solved Stringoholics : Solved Find The Next : Solved Merge elements : Solved Word Break : Solved 2 Sum : Solved Ath Magical Number : Unsolved Russian Doll Envelopes : Solved BST Iterator : Unsolved Kth Smallest Element in a Sorted Matri : Solved Reverse Link List Recursion : Unsolved Distinct Subsequences : Unsolved Middle element of linked list : Unsolved Permutations : Solved Max subset XOR : Unsolved Maximum Edge Removal : Solved Sorted Permutation Rank : Unsolved N digit numbers with digit sum S : Unsolved Flatten Binary Tree to Linked List : Unsolved Chain of Pairs : Unsolved Divisor Sequences : Unsolved Box Stacking Problem : Solved Maximal String : Solved Palindromic Binary Representation : Unsolved Count of paths in a grid : Unsolved Smallest sequence with given Primes : Unsolved Length of longest consecutive ones : Unsolved Rotate Matrix : Solved Number of islands II : Solved Wave Array : Solved Grid Unique Paths II : Unsolved Grid Unique Paths II : Solved Contiguous Array : Unsolved Contiguous Array : Solved Max subset XOR : Solved Palindromic Characteristics : Unsolved Number of islands II : Unsolved Maximum product of an increasing subse : Unsolved XOR TRIPLETS : Solved Inorder Traversal : Unsolved Valid phone number : Unsolved Multiply Strings : Solved Tushar's Birthday Party : Unsolved Reverse Linked List : Unsolved K-th character of decrypted string : Unsolved WHILE_CMPL : Solved Ath Magical Number : Solved Another chocolate game : Unsolved Paranthesis Everywhere : Unsolved Invert the Binary Tree : Solved Letter Phone : Solved Birthday odddays : Unsolved Short Films : Unsolved Median of stream of running integers : Unsolved Right view of Binary tree : Unsolved Pretty Json : Unsolved Repeating Sub-Sequence : Unsolved MAXSPPROD : Solved Very Hard Queries : Solved Least Common Ancestor : Solved Different Bits Sum Pairwise : Solved Sliding Window Maximum : Solved Palindromic Characteristics : Solved Minimum Bracket Reversals : Unsolved Maximum Sum Combinations : Unsolved Count of coprimes in two array : Unsolved AMORTIZED2 : Solved Rearrange Array : Solved First non-repeating character in a stre : Unsolved Increasing Path in Matrix : Solved Root to Leaf Paths With Sum : Unsolved Anagrams : Unsolved Search for a Range : Solved Solve sub-sequences and return OR : Unsolved Rod Cutting : Unsolved Equal Average Partition : Solved Maximum product of an increasing subse : Solved Delete middle of the linked list : Unsolved Equilateral Triangles using Toothpicks : Unsolved Birthday odddays : Solved Lexographically Greater Strings : Unsolved Count And Say : Solved Prime Sum : Solved FizzBuzz : Unsolved Reorder List : Solved Probablity of knight inside chess board : Unsolved Maximise the coins by popping balloons : Unsolved Probablity of knight inside chess board : Solved Find if there is a sub-array with 0 sum : Unsolved Step by Step : Solved Arrange II : Unsolved Single Number : Solved Middle element of linked list : Solved Snake Ladder Problem! : Solved Alice and Bob : Unsolved WoodCutting Made Easy! : Solved Symmetric Binary Tree : Unsolved Water Flow : Unsolved Subset Sum Problem! : Solved Min Sum Path in Matrix : Solved Paranthesis Everywhere : Solved Gas Station : Unsolved Maximum Weight Edge Sum : Unsolved Invoiced Billing : Unsolved CHOOSE1 : Solved Count of coprimes in two array : Solved Maximum Weight Edge Sum : Solved 3 Sum Zero : Solved PipeCUTS : Unsolved Delete middle of the linked list : Solved Black Shapes : Unsolved Distance between Nodes of BST : Unsolved Arithmetic Subsequences : Unsolved Arithmetic Subsequences : Solved Alternate positive and negative element : Unsolved Minimum Parantheses! : Solved Distribute Candy : Solved AMORTIZED2 : Unsolved Rod Cutting : Solved Temp : Unsolved Vowel and Consonant Substrings! : Solved Text Justification : Solved Count Complete Tree Nodes : Unsolved Consecutive Number Sum : Unsolved Integer To Roman : Unsolved stream of B : Unsolved PipeCUTS : Solved Maximum Ones After Modification : Unsolved Subset : Unsolved Longest Common Prefix : Unsolved City Tour : Unsolved Alice and Bob : Solved DEVICE CROSSOVER : Unsolved Invoiced Billing : Solved Palindrome String : Solved Symmetric Binary Tree : Solved Measure Milk by Cans : Unsolved Minimum operations of given type to mak : Solved Maximum product of an increasing subseq : Unsolved Kth Manhattan Distance Neighbourhood : Unsolved Permutations : Unsolved Largest Coprime Divisor : Solved Single Number : Unsolved Rust and his transfer : Solved Largest Coprime Divisor : Unsolved Flip Counter : Unsolved Maximum Median : Solved Maximum Ones After Modification : Solved Hotel Bookings Possible : Unsolved Ticket Game : Unsolved Patch the tire : Unsolved Maximum Median : Unsolved Ticket Game : Solved Gray Code : Solved String Sum : Unsolved stream of B : Solved Rust and his transfer : Unsolved Going back to OS : Unsolved Max edge queries! : Unsolved Temp : Solved Gray Code : Unsolved Minimise the maximum difference between : Solved Copy List : Unsolved ARRAY_2D : Unsolved Reverse String : Solved Simple Queries : Unsolved Magician and Chocolates : Solved Maximum Path in Arrays : Unsolved Container With Most Water : Solved LRU Cache : Solved Preorder Traversal : Solved Roman To Integer : Unsolved Good Ranges : Unsolved Count Permutations of BST : Unsolved Least Common Ancestor : Unsolved MATH_BUG02 : Unsolved Jump Game Array : Solved Count pairs in array whose sum is divis : Unsolved Scramble String : Solved Maximum Path in Arrays : Solved H-index II : Unsolved Inorder Traversal of Cartesian Tree : Unsolved Maximum Points on the same line : Unsolved String Sum : Solved Set Matrix Zeros : Solved Combine Maximum : Unsolved Job Sequencing : Unsolved ARRAY_IMPL1 : Unsolved Maximum product : Unsolved Wizards and Drawves : Unsolved Remove Nth Node from List End : Unsolved Sub Matrices with sum Zero : Unsolved Add Two Numbers as Lists : Solved H-index II : Solved Vertical Order traversal of Binary Tree : Solved Max Distance : Solved Remove Duplicates from Sorted Array II : Unsolved Best Time to Buy and Sell Stocks III : Unsolved Find Nth Fibonacci : Solved Rotated Sorted Array Search : Unsolved Path to Given Node : Unsolved Largest area of rectangle with permutat : Solved Max Sum Contiguous Subarray : Unsolved Minimum Lights to Activate : Solved Missing Element : Unsolved Palindrome Partitioning II : Unsolved Missing Element : Solved Find Nth Fibonacci : Unsolved Distribute Candy : Unsolved Consecutive Numbers Sum : Unsolved REC_CMPL3 : Solved Min Jumps Array : Solved Maximum product : Solved Maximum positivity : Unsolved Movie Character : Unsolved Tushar's Birthday Bombs : Solved Amazing Subarrays : Unsolved Postorder Traversal : Solved Rain Water Trapped : Solved MAXSPPROD : Unsolved Flip : Unsolved The Tribe : Solved Distinct Numbers in Window : Unsolved An Increment Problem : Solved Evaluate Expression : Unsolved Number of 1 Bits : Solved Sort by Color : Solved Maximum Intervals Overlap : Unsolved Atoi : Unsolved Remove_k _ Digits : Solved Path Sum : Solved Maximum Absolute Difference : Unsolved Largest Number : Unsolved Zigzag String : Solved Inversion count in an array : Solved Anti Diagonals : Solved Reverse the String : Solved Maximum positivity : Solved Matrix Median : Unsolved 4 Sum : Solved Clone Graph : Unsolved Longest valid Parentheses : Unsolved Diagonal Traversal : Unsolved Largest BST Subtree : Solved Maximum Size Square Sub-matrix : Unsolved Combination Sum : Solved Reverse Link List Recursion : Solved Largest Distance between nodes of a Tre : Solved An Increment Problem : Unsolved Convert Sorted List to Binary Search Tr : Unsolved Maximum Intervals Overlap : Solved Excel Column Number : Unsolved Minimum Lights to Activate : Unsolved Maximum Area of Triangle! : Unsolved Max Min : Unsolved Reverse Subarray for Sorting : Unsolved Dungeon Princess : Solved Design Cache Maximum Area of Triangle! : Solved Diffk : Solved Word Ladder I : Unsolved MATH_BUG02 : Solved Min Jumps Array : Unsolved MINIMIZE THE XOR : Unsolved Rotate List : Solved Minimize the absolute difference : Unsolved Even Reverse : Unsolved Remove Half Nodes : Unsolved Spiral Order Matrix II : Solved Verify Prime : Unsolved XOR-ing the Subarrays! : Solved Palindromic Binary Representation : Solved Binary Representation : Unsolved Next Smallest Palindrome! : Unsolved Next Smallest Palindrome! : Solved Is Rectangle? : Unsolved NESTED_CMPL3 : Solved Bulbs : Solved Numbers of length N and value less than : Unsolved Kth Row of Pascal's Triangle : Solved Grid Unique Paths : Unsolved Minimize the absolute difference : Solved Reverse Subarray for Sorting : Solved Copy List : Solved Subarrays with distinct integers! : Unsolved Commutable Islands : Solved Implement Power Function : Solved NQueens : Unsolved Sort by Color : Unsolved Distribute in Circle! : Solved Total Moves For Bishop! : Solved Maximum Consecutive Gap : Solved Colorful Number : Solved Kth Smallest Element In Tree : Solved NEXTGREATER : Solved Design Messenger Word Search Board : Unsolved NQueens : Solved Max Non Negative SubArray : Unsolved Path with good nodes! : Unsolved Divide Integers : Unsolved Colorful Number : Unsolved Construct Binary Tree From Inorder And : Unsolved Reverse Link List II : Solved Alternate Lower Upper Sort : Unsolved Edit Distance : Unsolved Neutral Reviewers : Unsolved Shortest common superstring : Solved Word Break II : Unsolved Remove Consecutive Characters : Solved Nearest Smaller Element : Solved Elements which have at-least two greate : Solved SUBARRAY OR : Solved Possibility of finishing all courses gi : Unsolved Neutral Reviewers : Solved Sum of pairwise Hamming Distance : Solved Prime Numbers : Unsolved Remove the Substring : Solved 0-1 Knapsack : Solved Color of the last ball II : Solved Largest Continuous Sequence Zero Sum : Unsolved Xor Between Two Arrays! : Unsolved Merge Two Sorted Lists : Solved Anti Diagonals : Unsolved Unique Paths in a Grid : Solved Maximum Sum Square SubMatrix : Unsolved Merge K Sorted Lists : Solved Valid Path : Unsolved 4 Sum : Unsolved Valid Sudoku : Solved Arrange Cubes : Unsolved Sudoku : Unsolved Perfect Peak of Array : Solved Pascal Triangle : Solved Text Justification : Unsolved Trailing Zeros in Factorial : Unsolved Count Total Set Bits : Solved Merge two Binary Tree : Unsolved ZigZag Level Order Traversal BT : Unsolved Min Cost Path : Unsolved Medicine Chest on a Boat : Unsolved Perfect Peak of Array : Unsolved Convert to Palindrome : Solved Subarray with given XOR : Solved Convert Sorted List to Binary Search Tr : Solved Reverse Level Order : Unsolved Seats : Unsolved Excel Column Title : Solved Prisoners and Poison : Unsolved Sorted Permutation Rank with Repeats : Solved Cycle in Undirected Graph : Solved Minimum Characters required to make a S : Solved Min XOR value : Solved Root to Leaf Paths With Sum : Solved Large Factorial : Unsolved Reverse Level Order : Solved Are they same - I : Unsolved Disjoint Intervals : Unsolved Spiral Order Matrix I : Unsolved Divide Integers : Solved Counting Subarrays! : Solved Coin Sum Infinite : Solved Roman To Integer : Solved Flip Array : Unsolved Word Search Board : Solved Balanced Binary Tree : Unsolved Tiling With Dominoes : Unsolved Scramble String : Unsolved Falling Squares : Unsolved Remove Consecutive Characters : Unsolved Set Matrix Zeros : Unsolved 3 Sum : Unsolved Valid Number : Unsolved Maximum Path in Triangle : Unsolved Flatten Binary Tree to Linked List : Solved Redundant Braces : Unsolved Smallest Multiple With 0 and 1 : Unsolved Find Duplicate in Array : Unsolved Count Palindromic Subsequences : Solved Noble Integer : Unsolved Infix to Postfix : Unsolved Rearrange Array : Unsolved Merge Overlapping Intervals : Solved Palindrome Integer : Unsolved Longest Consecutive Sequence in Binary : Unsolved Balance Array : Solved Short Films : Solved 2 Sum : Unsolved Matrix Search : Solved Two Strings : Unsolved Pick from both sides! : Solved Subarray with B odd numbers : Solved Subarray with B odd numbers : Unsolved Remove Duplicates from Sorted List II : Unsolved Counting Triangles : Solved Special Integer : Unsolved Binary Tree From Inorder And Postorder : Unsolved 3 Sum : Solved Merge Two Sorted Lists II : Unsolved Implement Power Function : Unsolved Reverse Link List II : Unsolved Level Order : Solved NUMRANGE : Unsolved Partitions : Unsolved Kth Permutation Sequence : Unsolved Flip : Solved Length of Last Word : Solved Palindrome List : Unsolved Stepping Numbers : Solved Maximum Size Square Sub-matrix : Solved Sort array with squares! : Unsolved Diagonal Traversal : Solved Binary Tree From Inorder And Postorder : Solved Jump Game Array : Unsolved Rotated Sorted Array Search : Solved Remove Duplicates from Sorted Array : Unsolved Cycle in Undirected Graph : Unsolved Count Element Occurence : Unsolved XOR-ing the Subarrays! : Unsolved Next Pointer Binary Tree : Solved Intersection Of Sorted Arrays : Unsolved GCD_CMPL : Solved Generate all Parentheses II : Unsolved Arrange II : Solved Sorted Permutation Rank with Repeats : Unsolved Maximum Consecutive Gap : Unsolved Multiple left rotations of the array : Solved Shortest Unique Prefix : Solved Longest Common Subsequence : Solved Kth Node From Middle : Solved Kth Smallest Element in the Array : Solved Intersection Of Sorted Arrays : Solved Sort array with squares! : Solved Reverse a stack using recursion : Solved Unique Binary Search Trees II : Unsolved Interleaving Strings : Unsolved Palindrome Integer : Solved Maximum Unsorted Subarray : Solved Generate all Parentheses : Unsolved INVERSIONS : Solved Stepping Numbers : Unsolved Largest Distance between nodes of a Tre : Unsolved Longest Arithmetic Progression : Unsolved Anagrams : Solved Grid Unique Paths : Solved Maximal String : Unsolved First Missing Integer : Solved Disjoint Intervals : Solved Max Sum Without Adjacent Elements : Unsolved Remove Element from Array : Unsolved Spiral Order Matrix I : Solved Largest Rectangle in Histogram : Solved Minimum Characters required to make a S : Unsolved Palindrome List : Solved Merge two Binary Tree : Solved Ten Black and White Socks : Solved Longest Arithmetic Progression : Solved Sort Binary Linked List : Solved Xor Between Two Arrays! : Solved Partition List : Unsolved Subset : Solved Power Of Two Integers : Unsolved Majority Element : Solved Largest Rectangle in Histogram : Unsolved Cycle in Directed Graph : Solved 3 Sum Zero : Unsolved Region in BinaryMatrix : Solved Repeating Sub-Sequence : Solved Letter Phone : Unsolved Fraction : Unsolved Add One To Number : Solved Repeat and Missing Number Array : Unsolved Distinct Numbers in Window : Solved Min Depth of Binary Tree : Unsolved Merge Two Sorted Lists II : Solved Remove Duplicates from Sorted List : Unsolved Minimum Appends for Palindrome! : Unsolved Compare Version Numbers : Solved Possibility of finishing all courses gi : Solved

Provided solution will not work for a particular test case
[Min Steps in Infinite Grid : Solved]
(2)

Inorder Traversal without recursion and with space complexity O(1)
[Inorder Traversal : Unsolved]
(1)