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C. New Year and Domino time limit per test 3 seconds memory limit per test 256 megabytes input standard input output standard output C. New Year and D 阅读全文
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Description After their royal wedding, Jiajia and Wind hid away in XX Village, to enjoy their ordinary happy life. People in XX Village lived in beaut 阅读全文
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Problem Description The ALPC company is now working on his own network system, which is connecting all N ALPC department. To economize on spending, th 阅读全文
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LCA 题意：给一个无根树，有q个询问，每个询问3个点，问将这3个点连起来，距离最短是多少， LCA的模板题，分别求LCA(X,Y),LCA(X,Z),LCA(Y,Z)， 和对应的距离，然后3个距离相加再除以2就是这个询问的结果 阅读全文
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Problem Description After World War X, a lot of cities have been seriously damaged, and we need to rebuild those cities. However, some materials neede 阅读全文
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How far away ？ Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 22976 Accepted Submission(s): 9078 阅读全文