InterviewBit Problems   Maximal String : Solved

About the Maximal String : Solved category (1)
Simple C++ Soln using backtracking (7)
C++ | Maximal String | backtrack approach (1)
Simple, easy C++ solution using Backtracking (3)
Can anyone please help me why my code is failing for large test cases? (1)
Similar to permutation of a string (1)
Why Simple Greedy Fails For Larger Test Cases? (4)
What is problem with this greedy algorithm? I have taken care of cases like string = 2399, b = 2 (1)