GavinZheng's blog

By GavinZheng, history, 13 months ago, In English,

Here is the problem: 986C My submission got AC: My submission

But I found that my solution is totally wrong. Here is the hack data: 2 2 3 2 My output is 1. Obviously, the correct ans is 2. And I discoverd this data can hack my classmate's submission too.

What should I do? Can I add this data to Codeforces dataset?

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