Help me with problem Buy1-Get1

general
1

Problem Link:- BUY1GET1 Problem - CodeChef
Solution link :- jW3pPU - Online C++ Compiler & Debugging Tool - Ideone.com
Please guide me if my logic is correct as i am getting runtime error(SIGABRT) even if it is running well. Was my logic correct i.e, compromising time and space complexity would the program run on this logic?

2

Your logic is correct.
However you did not read the statement correctly.
The input string can contain a-z and A-Z.
Your code tries to access invalid array location (-ve) for A-Z hence it gives SIGABRT.

Fix this and it should work.

4

Thanks for your help