I have a sucefull hack of problem B during the contest, it should be added in the data of System Tset.↵
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[Sucessful hack](https://mirror.codeforces.com/contest/2055/submission/300735053)↵
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There is a submission that can be hacked by the data,but it is accepted in the system test.↵
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[The submission](https://mirror.codeforces.com/contest/2055/submission/300702901)↵
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So i suppos that My hack data has not been added in the System Test,the System test has something wrong.↵
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[Sucessful hack](https://mirror.codeforces.com/contest/2055/submission/300735053)↵
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There is a submission that can be hacked by the data,but it is accepted in the system test.↵
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[The submission](https://mirror.codeforces.com/contest/2055/submission/300702901)↵
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So i suppos that My hack data has not been added in the System Test,the System test has something wrong.↵
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