can anyone say where I am wrong

Question

https://code.sololearn.com/cGBfP7eBC1Tr
take input
3
7
1000101
0110100
4
1101
0010
6
100111
010011
output is
YES
NO
NO

Answer 1

I see a warning that indicates a char data type is an improper array index. The warning goes away if you declare i as an int instead of char.

Answer 2

Thank u so much