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O -计数Time Limit:2000MSMemory Limit:262144KB64bit IO Format:%I64d & %I64uDescriptionGerald got a very curious hexagon for his birthday. The boy found o... 阅读全文
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L -计数，排列Time Limit:1000MSMemory Limit:32768KB64bit IO Format:%I64d & %I64uDescription大家常常感慨，要做好一件事情真的不容易，确实，失败比成功容易多了！ 做好“一件”事情尚且不易，若想永远成功而总从不失败，那更是难上... 阅读全文
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J -数论，质因数分解Time Limit:1000MSMemory Limit:32768KB64bit IO Format:%I64d & %I64uDescriptionTomorrow is contest day, Are you all ready? We have been train... 阅读全文
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F -概率（经典问题）Time Limit:2000MSMemory Limit:32768KB64bit IO Format:%lld & %lluDescriptionSometimes some mathematical results are hard to believe. One of ... 阅读全文
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DescriptionProbabilityTime Limit: 1 sec Memory Limit: 16MBConsider rectangular coordinate system and point L(X,Y) which is randomly chosen among all p... 阅读全文