https://mirror.codeforces.com/contest/1506/submission/146973253 Why I'm getting TLE?
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Increase the size of dp,
instead of dp[m + 1][n + 1] write smth like dp[N][N] (where N > max(n, m))
because your code take time greater time , compare to what they asked it's the simpelest answer , not to write a blog for it
Ha ha don't give us lecture what to do what not