InterviewBit Problems   First non-repeating character in a stre : Solved

About the First non-repeating character in a stre : Solved category (1)
Following their hints (2)
Python3 soln, xyzabc (1)
Easy python code using python list (1)
Easy Python Code using Disct and queue (1)
Simple 12 line CPP code O(n) time (1)
O(n) c++ (working & interesting) code without stack & queues, with O(1) space complexity (1)
Stack/Queue probably not neede (1)
Using two stack (1)
Java solution using Set and Queue (1)
For people getting TLE for O(n) solution in C++ (2)
Easy solution using map in c++ (1)
Simple java solution in O(N) : Explained in detail (1)
Case failure - what am I missing in code? (1)
Small Solution, First non-repeating character in a stream of characters (1)
C++ solution using map and vector (1)
C++ queue sol for non repeating (1)
Tip to Solve without encountering TLE (3)
9 lines C++ solution, without using queue (1)
Python 3 - Happy Coding :) (1)
Simple as F**k sol in c++ (1)
Same as LRU Cache (1)
Java Solution with Queue O(n) (1)
C++ solution, easy to solve (1)
Queue and an array to use as a map for storing if some character has repeated or not (1)
Working Python solution for non-repeating character problem (1)
C++ soln with comments using queue + hash map (1)