https://codeforces.com/contest/820/submission/82782140 i didnot get what is the error in logic what does they mean by better answer?please help thanks in advance
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The question required you to print an optimal solution. When the jury says they have a better answer, it means that your answer is not optimal. Your logic might be correct, it may give a solution but it is not optimal.
then how to rectify it?
Maybe by improving upon your current solution or thinking up a new one.