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E. Minimum spanning tree for each edge 题目连接： Description Connected undirected weighted graph without self loops and multiple edges is given. Graph con 阅读全文
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B. Approximating a Constant Range Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/602/problem/B Description When Xellos was 阅读全文
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Bob’s Race Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://acm.hdu.edu.cn/showproblem.php?pid=4123 Description Bob wants to hold a race to encoura 阅读全文