I am very sorry that my English is poor. But ... I want know a thing. this problem I find another data that
7
41 60 76 22 83 84 100
the answer is "0". But this code and that code print "1". But they both accepted the problem. What happened?
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WorldQuant Round 1 (Codeforces Round 1128, Div. 1 + Div. 2)
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Idk man, but what I do know is that that contest is from 5 years ago. No matter what you do now, their solutions will still be accepted. It is possible that system tests were very weak so incorrect solution still got accepted.