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B. Alyona and a tree 题目连接： http://codeforces.com/contest/739/problem/B Description Alyona has a tree with n vertices. The root of the tree is the vert 阅读全文
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虽然这个队，以后再也没有了，但是他的模板，是永垂不朽的！【误 include __gnu_pbds::priority_queue Q; 优先队列，配对堆默认，从小到大! __gnu_pbds::priority_queue , pairing_heap_tag Q; __gnu_pbds::pri 阅读全文
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C. Binary Table 题目连接： http://codeforces.com/problemset/problem/662/C Description You are given a table consisting of n rows and m columns. Each cell o 阅读全文