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The sequence of integers a1,a2,…,ak is called a good array if a1=k−1 and a1>0. For example, the sequences [3,−1,44,0],[1,−99] are good arrays, and the 阅读全文
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推荐博客 ： https://blog.csdn.net/wbin233/article/details/72998375 以下均转载上文： 简述 康托展开是一个全排列到一个自然数的双射，常用于构建hash表时的空间压缩。设有n个数（1，2，3，4,…,n），可以有组成不同(n!种)的排列组合，康托 阅读全文
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Genghis Khan(成吉思汗)(1162-1227), also known by his birth name Temujin(铁木真) and temple name Taizu(元太祖), was the founder of the Mongol Empire and the grea 阅读全文
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Alice and Bob are going on a trip. Alice is a lazy girl who wants to minimize the total travelling distance, while Bob as an active boy wants to maxim 阅读全文
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A school bought the first computer some time ago(so this computer's id is 1). During the recent years the school bought N-1 new computers. Each new co 阅读全文
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A tree with N nodes and N-1 edges is given. To connect or disconnect one edge, we need 1 unit of cost respectively. The nodes are labeled from 1 to N. 阅读全文
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随着杭州西湖的知名度的进一步提升，园林规划专家湫湫希望设计出一条新的经典观光线路，根据老板马小腾的指示，新的风景线最好能建成环形，如果没有条件建成环形，那就建的越长越好。 现在已经勘探确定了n个位置可以用来建设，在它们之间也勘探确定了m条可以设计的路线以及他们的长度。请问是否能够建成环形的风景线？如 阅读全文
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There is one last gate between the hero and the dragon. But opening the gate isn't an easy task. There were n buttons list in a straight line in front 阅读全文
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When we are focusing on solving problems, we usually prefer to stay in front of computers rather than go out for lunch. At this time, we may call for 阅读全文