Wrong answer on codeforces question

https://codeforces.com/gym/320678/problem/B

Pls debug this code !

same issue with this problem.

pls dont ask live problems.its unethical and unfair

@aman212yadav

question:-

consider this case->
10101
here correct answer should be
1101 but urs will give 1011

traverse from left to right

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