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HDU 5159 Card(数学期望)
题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=5159Card Problem DescriptionThere are x cards on the desk, they are numbered from 1 to x. The score of the card which is numbered i(1原创 2015-09-02 18:18:45 · 446 阅读 · 0 评论 -
hdu4651 Partition
题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=4651PartitionProblem DescriptionHow many ways can the numbers 1 to 15 be added together to make 15? The technical term for what you are a原创 2015-08-07 13:42:23 · 502 阅读 · 0 评论 -
整数划分问题
题意:给你一个整数n,求n的划分种类总数思路:原创 2017-01-05 21:36:23 · 825 阅读 · 0 评论