# InterviewBit Problems

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: Unsolved Triplets with Sum between given range : Solved Max Product Subarray : Solved Longest Subarray Length : Solved Shortest Distance in a graph with two d : Solved Spider's Web : Unsolved Valid Number : 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 Paint House! : Solved ARRAY_BUG : Solved Majority Element : Unsolved Clone a linked list : Solved Valid Binary Search Tree : Unsolved Longest Palindromic Subsequence : Solved Prime Numbers : Solved Numbers with most occurences : Solved Balanced Binary Tree : Solved Puts for Print : Unsolved 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 Thread : Solved Compare Version Numbers : Solved QUIRKS MODE : Unsolved Convert an arbitrary Binary Tree to a t : Solved maximum sum of array with no repeating : Solved INVERSIONS : Unsolved Spinning Disc's Direction : Solved Count Delete : Solved Spinning Disc's Direction : Unsolved Jelly Beans Jars : Solved Treasure Hunt : Unsolved Color of the last ball : Unsolved NESTED_CMPL2 : Solved Maximum Depth : Unsolved Equilateral Triangles using Toothpicks : Solved Distinct Primes : Solved Convert to Palindrome : Unsolved Meeting rooms : Solved Good Subarrays : Unsolved Arithmetic operators on Numbers : Solved Micro and Lucky Tree : Solved Divide the Cake : Solved Egg Drop Problem! : Unsolved Min Steps in Infinite Grid : Unsolved Maximum difference between two elements : Unsolved Repeat and Missing Number Array : Solved Color of the last ball II : Unsolved World Trips : Solved Genie and Hats : Solved Going back to OS : Solved Validating Email Address using Filter : Solved Arrange Cubes : Unsolved Measure Time by Hourglass : Solved Arrange Cubes : Solved Swap List Nodes in pairs : Unsolved Activity Selection : Unsolved Is Rectangle? : Solved Cats and a Square : Solved Thread : Unsolved Maximum Depth : Solved Transpose File : Unsolved Max Sum Without Adjacent Elements : Solved Max Product Subarray : Unsolved EDIBLE STRINGS : Solved Helium Balloon : Solved Activity Selection : Solved Container With Most Water : Unsolved Make a Statement : Solved Two Numbers : Solved Numbers of length N and value less than : Solved LONGEST COMMON SUBSTRING : Unsolved CHOOSE3 : Solved Flip Counter : Solved Minimum Number of Refueling Stops : Solved Helium Balloon : Unsolved Good Subarrays : Solved RECTANGLE SUM : Unsolved Number of sextuplets (or six values) th : Solved Redundant Braces : Solved Arithmetic operators on Numbers : Unsolved Train Station : Solved Diffk II : Solved Sum binary tree or not : Solved First Repeating element : Solved Excel Column Title : Unsolved Min Elevator Trips : Unsolved Palindrome Partitioning II : Solved Good Processor : Unsolved Quarters on a Table : Solved Divisor Sequences : Solved Divide Gold Bar : Unsolved World Trips : Unsolved Color of the last ball : Solved Blindfolded Coin Toss : Unsolved 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 Knight On Chess Board : Solved Measure Milk by Cans : Solved Binary Tree Paths : Unsolved Maximum level sum : Solved Measure Time by Burning Ropes : Unsolved Max Non Negative SubArray : Solved Rook Movement : Unsolved Max Sum Path in Binary Tree : Unsolved Blindfolded Coin Toss : Solved Invert the Binary Tree : Solved Celebrity Problem : Unsolved Six Colored Cubes : Unsolved Last Palindromic Date : Solved Distribute in Circle! : Unsolved Binary Tree Paths : Solved Cats and a Square : Unsolved RECTANGLE SUM : Solved Next Number II : Unsolved Longest path in a subtree : Unsolved Bee Travel : Unsolved Remove Duplicate Letters : Solved Reverse Alternate K Nodes : Unsolved REC_CMPL1 : Solved Valid Path : Solved LONGEST COMMON SUBSTRING : Solved Roads and Libraries : Unsolved Two Numbers : Unsolved Capture Regions on Board : Unsolved Distinct Subsequences : Solved Arithmetic operators on Strings : Solved Compare Version Numbers : Unsolved Find the Defective Ball II : Unsolved Loops : Solved City Tour : Solved Palindromic Substrings Count : Solved Right view of Binary tree : Solved One Mile on the Globe : Solved EZPZ : Solved Deterministic Finite Automaton : Unsolved Deterministic Finite Automaton : Solved Scores : Solved Byes : Unsolved Ten Black and White Socks : Unsolved Distinct Initial Matrices : Solved Rook Movement : Solved Tiling With Dominoes : Solved Last Palindromic Date : Unsolved Region in BinaryMatrix : Unsolved Cross the Bridge II : Unsolved Ants on a Triangle : Unsolved Matrix Search : Unsolved Minimum cost to connect cities : Unsolved BALLS IN BOXES : Solved Chocolate Distribution : Solved Trailing Zeroes : Unsolved Design Messenger : Unsolved Common Nodes in Two Binary Search Trees : Solved Celebrity Problem : Solved Snake Ladder Problem! : Solved Longest Common Subsequence : Unsolved DEVICE CROSSOVER : Solved Kth Node From Middle : Solved Remove Invalid Parentheses : Unsolved Burst Balloons : Unsolved Ways to make array non decreasing : Solved Dinner Hand Shakes : Unsolved Minimum cost to connect cities : Solved Integer To Roman : Solved Increasing SubArrays : Solved Modular Expression : Solved AMORTIZED1 : Unsolved Remove Invalid Parentheses : Solved Evaluate Expression : Solved Max Continuous Series of 1s : Unsolved Arithmetic operators on Strings : Unsolved Divide Gold Bar : Solved Burst Balloons : Solved Cross the Bridge : Unsolved Distinct Initial Matrices : Unsolved Shortest Path in Simple Graph : Unsolved Sum Root to Leaf Numbers : Unsolved Longest path in a subtree : Solved Design URL Shortener Transform CSV : Solved Conditional or Ternary Expression : Unsolved Dinner Hand Shakes : Solved Increasing SubArrays : Unsolved Get Mode Array Updates : Unsolved PRODDISC : Unsolved Min Jumps : Unsolved Min Jumps : Solved Reverse pairs : Unsolved Byes : Solved Grep : Solved NEIGH : Unsolved Prisoners and Poison : Solved Count Total Set Bits : Unsolved Power of 3 : Unsolved Max Chunks To Make Sorted : Solved Profit Maximisation : Unsolved Root to Leaf Paths With Sum : Solved Genie and Hats : Unsolved Coin Sum Infinite : Unsolved Gcd Ordering : Unsolved The Ghost Type : Unsolved WoodCutting Made Easy! : Unsolved Build Identical Trees : Solved Reverse the String : Unsolved Tree coloring with three colors : Unsolved Equal Tree Partition : Unsolved Decode String : Unsolved Largest BST Subtree : Unsolved Treasure Hunt : Solved Transform CSV : Unsolved Input and Output : Solved Validating Email Address using Filter : Unsolved IIFE : Solved Number of 1 Bits : Unsolved Substring Concatenation : Solved Palindrome Pairs : Unsolved PRODDISC : Solved One Mile on the Globe : Unsolved Fraction : Solved The Ghost Type : Solved Decode String : Solved Node distance C in binary tree : Unsolved Profit Maximisation : Solved Pattern Printing -2 : Unsolved ITS TIME FOR SOME DBMS : Unsolved Cycle in Directed Graph : Solved Power of 3 : Solved Input and Output : Unsolved Next Number II : Solved Marbles in Jar : Unsolved WHILE_CMPL : Unsolved Loops : Unsolved Shortest Distance in a Maze : Unsolved Deque : Solved Shortest Distance in a Maze : Solved Highly Consistent Database : Solved Stdin and Stdout : Solved Ugly Pairs : Unsolved Magician and Chocolates : Unsolved Add One To Number : Solved Path Sum : Unsolved Tree coloring with three colors : Solved Balanced Parantheses! : Solved Min Stack : Solved Search in a row wise and column wise so : Unsolved Next Similar Number : Unsolved Sub-matrix Sum Queries : Unsolved Node distance C in binary tree : Solved Combine Maximum : Solved ZigZag Level Order Traversal BT : Solved Flip Array : Solved Useful Extra Edges : Solved KEEP SWAPPING 2 : Unsolved Deepu and girlfriend : Unsolved Longest Subarray Difference : Solved FRUIT PACKETS : Unsolved Matrix Permutation : Unsolved Are they same - I : Solved Bus and Passenger : Unsolved Ugly Pairs : Solved Pattern Printing -2 : Solved Buffered Reader : Solved LOOP_CMPL2 : Unsolved Cut the rod : Unsolved Identical Binary Trees : Unsolved Minimum Difference Subsets! : Solved Quarters on a Table : Unsolved Jump Statements : Unsolved Shortest Distance from All Buildings : Unsolved Minimum Cost to Hire K Workers : Unsolved Datatypes : Solved Single Element in a Sorted Array : Solved Sub-matrix Sum Queries : Solved Design Search Typeahead K DISTANCE : Unsolved CHOOSE1 : Unsolved Bus and Passenger : Solved Solve sub-sequences and return OR : Solved Time Based Key-Value Store : Unsolved Design Twitter Marbles in Jar : Solved Design Linked list : Unsolved Sorted Insert Position : Unsolved Ratio of Boys and Girls : Unsolved Grep Log : Solved Sort List : Unsolved NEIGH : Solved REC_CMPL3 : Unsolved Permutation Swaps! : Solved Palindrome Pairs : Solved Highly Consistent Database : Unsolved Deque : Unsolved Pattern Printing -1 : Unsolved Shortest Distance from All Buildings : Solved Bee Travel : Solved EZPZ : Unsolved Ways to form Max Heap : Solved Stdin and Stdout : Unsolved Validating Roman Numerals : Solved Count of rectangles with area less than : Solved Delete Edge! : Unsolved Stringoholics : Unsolved Intersecting Chords in a Circle : Unsolved MIN MAX RIDDLE : Unsolved LOOP_CMPL : Solved Variables and Types : Unsolved Kingdom War : Unsolved GCD_CMPL : 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 Remove Duplicates from Sorted List : Solved Hotel Reviews : Unsolved Fastest Horses : Solved Grep Log : Unsolved Deepu and girlfriend : Solved Regular Expression Match : Solved Pattern Printing -1 : Solved Sum of all Submatrices : Solved Find subsequence : Unsolved Ratio of Boys and Girls : Solved N max pair combinations : Solved 2-Sum Binary Tree : Solved Best Time to Buy and Sell Stocks I : Solved Consecutive Numbers Sum : Solved Good Processor : Solved Diagonal Traversal : Solved WINNER NAME : Unsolved Shortest Path in Simple Graph : Solved Rotate List : Unsolved Tenth Line : Unsolved ADD OR NOT : Solved Fake Note : Unsolved Valid Sudoku : Unsolved Unique Binary Search Trees II : Solved Pairs With Given Xor : Unsolved Best Time to Buy and Sell Stocks I : Unsolved Preorder Traversal : Unsolved Divisibility by 8 : Unsolved LOOP_CMPL : Unsolved Consecutive Number Sum : Solved Count Right Triangles : Unsolved Cousins in Binary Tree : Unsolved Equal Average Partition : Unsolved Design Cache : Solved Tushar's Birthday Party : Solved Divide the Cake : Unsolved Smallest Subarray : Unsolved Lines in a given range : Solved Measure Time by Hourglass : Unsolved SUBTRACT : Unsolved REC_CMPL2 : Unsolved Conditions and If-Else : Solved Equal : Unsolved Longest valid Parentheses : Solved Boundary Traversal Of Binary Tree : Solved Justified Text : Unsolved Accessibility : Solved Maximal String : Solved Sum of minimum and maximum elements of : Unsolved MIN MAX RIDDLE : Solved 132 Pattern : Unsolved Eggs and Building : Unsolved Divisibility by 8 : Solved Next Greater Number BST : Unsolved IIFE : Unsolved Compute nCr % m : Unsolved Largest Coprime Divisor : Solved WINNER NAME : Solved Coins in a Line : Unsolved Design Cache : Unsolved Rearrange the array : Unsolved Max Chunks To Make Sorted II : Unsolved Path in Directed Graph : Unsolved Actors and their Movies : Solved Max Min : Solved LEFTOVER : Unsolved LEFTOVER : Solved All Unique Permutations : Unsolved Order them : Unsolved Min Stack : Unsolved Accessibility : Unsolved Noble Integer : Solved Sum of divisor of N factorial : Unsolved Sorted Permutation Rank : Solved Stairs : Solved All Factors : Unsolved Operators : Solved Try some SQL : Unsolved Count Right Triangles : Solved Sharding a Database : Solved Find the Defective Ball : Unsolved Conditions and If-Else : Unsolved Water Flow : Solved Compute nCr % m : Solved BST nodes in a range : Unsolved Validating Phone Numbers : Solved Allocate Books : Unsolved Subarray Sum Equals K : Unsolved Count the primes : Unsolved Pick from both sides! : Unsolved Functions : Solved Longest Arithmetic Progression : Solved Parity Queries : Unsolved Pascal Triangle : Unsolved MinimiZe : Solved List Cycle : Solved Step by Step : Unsolved Highest Product : Unsolved ITS TIME FOR SOME DBMS : Solved 132 Pattern : Solved Mod Sum : Unsolved Rearrange the array : Solved Remove Nth Node from List End : Solved Best Time to Buy and Sell Stock with Co : Unsolved Painter's Partition Problem : Solved Maximum array sum after B negations : Unsolved Dictionary : Unsolved Rain Water Trapped : Unsolved 3 Length Paths : Solved Remove the Substring : Unsolved Longest Subarray Difference : Unsolved Min Jumps Array : Unsolved Patch the tire : Solved Merge Overlapping Intervals : Unsolved Add Two Numbers as Lists : Unsolved Sharding a Database : Unsolved ODD SUM : Unsolved Find Duplicate in Array : Solved Bulbs : Unsolved Best Time to Buy and Sell Stock atmost : Solved Minimum Paratheses! : Unsolved 100 People in a Circle : Solved Order them : Solved Try some SQL : Solved Level Order : Unsolved MODIFIED SEARCH : Unsolved Check two bracket expressions : Solved K DISTANCE : Solved Ways to color a 3xN Board : Unsolved Maximum array sum after B negations : Solved Minimum Paratheses! : Solved Find Duplicate in Array : Unsolved JAVASCRIPT TAG : Solved Sum of divisor of N factorial : Solved ODD SUM : Solved Leaders in an array : Solved Something on IP's : Unsolved Best Time to Buy and Sell Stock with Co : Solved Sort by Frequency : Unsolved Parity Queries : Solved Subarray Sum Equals K : Solved PRETTYPRINT : Unsolved Design URL Shortener : Solved Insertion Sort List : Unsolved Compute nCr % p : Unsolved Find the Defective Ball : Solved JAVASCRIPT TAG : Unsolved 3 Length Paths : Unsolved Minimum operations of given type to mak : Unsolved Mod Sum : Solved Increasing Path in Matrix : Unsolved The Sequence game : Solved Finding Position : Solved The Tribe : Unsolved LRU Cache : Unsolved Binary Representation : Solved Wizards and Drawves : Solved Design URL Shortener : Unsolved Justified Text : Solved 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 Word Ladder II : Unsolved Compute nCr % p : Solved Find subsequence : Solved MinimiZe : Unsolved Black Shapes : Solved Difference between odd and even level : Unsolved GREEDY PICK : Unsolved Dungeon Princess : Unsolved Classes : Solved Shortest Unique Prefix : Unsolved Convert the amount in number to words : Solved Array and Prime Divisors : Unsolved MODIFIED SEARCH : Solved N digit numbers with digit sum S : Solved REMOVE DUPLICATES : Unsolved Light Switches in the Cellar : Unsolved Grep : Unsolved Smallest Subarray : Solved Loops- Java : Solved CHOOSE2 : Solved Best Time to Buy and Sell Stock with Tr : Unsolved Longest Palindromic Subsequence : Unsolved Search for a Range : Unsolved Rotated Arrays : Unsolved Cousins in Binary Tree : Solved Zigzag String : Unsolved Six Colored Cubes : Solved Breaking Chocolate Bars : Solved Starting indices of the substrings in s : Solved Into Blocks : Unsolved Balanced Brackets Queries : Unsolved Max Chunks To Make Sorted II : Solved Kingdom War : Solved Array and Prime Divisors : Solved Maximum Rectangle : Solved Random Attendance : Unsolved Matrix Permutation : Solved BST Iterator : Solved Subsets II : Solved GREEDY PICK : Solved Another chocolate game : Solved REMOVE DUPLICATES : Solved Next Pointer Binary Tree : Unsolved Maximal String : Unsolved Common Nodes in Two Binary Search Trees : Unsolved Build Identical Trees : Unsolved Delete Edge! : Solved Remove K Digits : Unsolved Different Bits Sum Pairwise : Unsolved Longest Common Prefix II : Solved Regular Expression Match : Unsolved 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 Implement StrStr : Unsolved Sort List : Solved Convert the amount in number to words : Unsolved Recover Binary Search Tree : Unsolved Partitions : Unsolved Max Distance : Unsolved Kth Smallest Element In Tree : Unsolved NUMRANGE : Solved NEXTGREATER : Unsolved Best Time to Buy and Sell Stock with Tr : Solved TOP VIEW : Solved Ways to Decode : Unsolved Fake Note : Solved Loops- Java : Unsolved Kth Permutation Sequence : Solved Random Attendance : Solved Maximum Frequency stack : Unsolved Balanced Brackets Queries : Solved Two out of Three : Solved Diameter of Binary Tree : Unsolved Maximum Longest Common Subsequence : Unsolved Maximum Longest Common Subsequence : Solved Vowels : Solved Get Mode Array Updates : Solved Longest Common Prefix II : Unsolved Remove K Digits : Solved Merge elements : Unsolved Anagram Substring Search : Unsolved Large Factorial : Solved Seats : Solved Rotated Arrays : Solved ARRAY_BUG : Unsolved Functions - Basic : Solved K-th character of decrypted string : Solved Measure Time by Burning Ropes : Solved Sort an array according to the order de : Unsolved Reverse Linked List : Solved Swap Forward And Backward Slash : Unsolved Word Ladder II : Solved Heater and Houses : Unsolved Different Bits Sum Pairwise : Solved Merge Two BSTs : Unsolved Equal : Solved First Scheduler : Unsolved Diameter of Binary Tree : Solved B XOR : Unsolved Count Element Occurence : Solved Count Permutations of BST : Solved Anagram Substring Search : Solved Stairs : Unsolved Remove Punctuations : Unsolved Longest Increasing Subsequence : Unsolved SUBTRACT : Solved Hotel Bookings Possible : Solved Count of pairs with the given sum II : Unsolved Substring Concatenation : Unsolved Ways to color a 3xN Board : Solved Add Binary Strings : Unsolved Spider's Web : Solved Scores : Unsolved Maximum level sum : Unsolved Methods - Java : Solved Merge K Sorted Lists : Unsolved Evaluate Expression To True : Solved Maximum coin in a tree : Unsolved Make a Statement : Unsolved Sort by Frequency : Solved Maximum Frequency stack : Solved Count the primes : Solved Balance Array : Unsolved B XOR : Solved Verify Prime : Solved Subarray with given XOR : Solved Count of pairs with the given sum II : Solved ARRAY_IMPL1 : Solved Valid Ip Addresses : Solved Greatest Common Divisor : Unsolved 100 People in a Circle : Unsolved Reduce the string : Unsolved The square game : Unsolved Sort an array according to the order de : Solved Simplify Directory Path : Solved 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 Next Permutation : Unsolved Construct Binary Tree From Inorder And : Solved First Scheduler : Solved Unique Binary Search Trees : Solved Heater and Houses : Solved Substring Game : Unsolved Leaf nodes from Preorder of a Binary Se : Unsolved Convert Integer To Roman Number : Unsolved Train Station : Unsolved Lines in a given range : Unsolved All Factors : Solved SUMMATION : Unsolved SUMMATION : Solved Spiral Order Matrix II : Unsolved Design Search Typeahead : Solved Longest Increasing Subsequence : Solved Methods - Java : Unsolved Maximum Product Increasing Subsequence : Unsolved Functions - Basic : Unsolved Meeting rooms : Unsolved Remove Duplicates from Sorted Array II : Solved Box Stacking Problem : Unsolved Check divisibility by 7 : Unsolved The square game : Solved REVERSE OR NOT : Unsolved Smallest Good Base : Unsolved Minimum Difference Subsets! : Unsolved Maximum Sum Triplet : Solved Tushar's Birthday Bombs : 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 Longest Subarray Sum B : Unsolved PRETTYPRINT : Solved In an array : Unsolved Assign Mice to Holes : Solved Task Scheduler : Unsolved Design Search Typeahead : Unsolved Median of stream of running integers : Solved MATH_BUG01 : Unsolved Leaders in an array : Unsolved Valid BST from Preorder : Solved 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 Queen Attack : Solved CHOOSE2 : Unsolved Next Greater Number BST : Solved LCA of array : Unsolved Too Odd to be a Palindrome : Solved CHOOSE3 : Unsolved Variable and Types : Solved Tiling Problem : Unsolved Delete and Conquer : Solved Matrix Search : Solved Travelling Saleman Problem : Solved Palindrome Partitioning : Unsolved Counting Special Numbers! 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Easy to understand C++, inorder iterative version in O(h) space & O(n) time complexity
[2-Sum Binary Tree : Solved]
(1)

Why are we taking 2d array we can store sequence in simple vector or 1D array
[Longest Common Subsequence : Unsolved]
(3)

Why it is showing Partially correct even if i have used O(n) time
[Vowel and Consonant Substrings! : Unsolved]
(1)

Easy Solution in O(n) <-- TC and o(1) space complexity cant be easier than this
[Vowel and Consonant Substrings! : Solved]
(1)

Solution using binary search for peak point and final answer
[Search in Bitonic Array! : Solved]
(1)