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Time Limit:1000MS Memory Limit:262144KB 64bit IO Format:%I64d & %I64u Description You are given a sequence of positive integers x1, x2, ..., xn and two non-negative integers a and b. Your ... 阅读全文
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C. Alice and Bob time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output It is so boring in the summer holiday, isn't it? So Alice and Bob have in... 阅读全文
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B. Fixed Points time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output A permutation of length n is an integer sequence such that each integer fr... 阅读全文
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Time Limit:2000MS Memory Limit:262144KB 64bit IO Format:%I64d & %I64u Description You want to arrange n integers a1, a2, ..., an in some order in a row. Let's define the value of an arrangemen... 阅读全文
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免费馅饼Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 24440 Accepted Submission(s): 8264 Problem Description 都说天上不会掉馅饼，但有一天gameboy正走在回家的小径上，忽... 阅读全文
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Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 8767 Accepted Submission(s): 3398 Problem Description 某国为了防御敌国的导弹袭击,发展出一种导弹拦截系统.但是这种导弹拦截系统有一个... 阅读全文
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Time Limit:1000MS Memory Limit:32768KB 64bit IO Format:%I64d & %I64u Description Now I think you have got an AC in Ignatius.L's "Max Sum" problem. To be a brave ACMer, we always challenge ou... 阅读全文
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转自http://www.cnblogs.com/drizzlecrj/archive/2008/09/12/1290176.html 稳定婚姻是组合数学里面的一个问题。 问题大概是这样：有一个社团里有n个女生和n个男生，每位女生按照她的偏爱程度将男生排序，同时每位男生也按照自己的偏爱程度将女生排序。然后将这n个女生和n个男生配成完备婚姻。 如果存在两位女生A和B，两位男生a和b，使得A和a... 阅读全文
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TravelTime Limit: 10000/2000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 3059 Accepted Submission(s): 1051 Problem Description One day, Tom traveled to a... 阅读全文