Hi All
Can someone help find the fault in the logic ?
https://mirror.codeforces.com/contest/1534/submission/119410596
Regards
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I think the fault in your logic is that you only consider the local locations (top, down, left, right) of a specific cell.
You can observe that if you set even one character, then the whole array is decided. Check the editorial for a more in-detail explanation.