2013年12月9日
DP题目 sicily 1687 Permutation
摘要： DP 水题PermutationConstraintsTime Limit: 1 secs, Memory Limit: 32 MBDescriptionPermutation plays a very important role in Combinatorics.For example, 1 2 3 4 5 and 1 3 5 4 2 are both 5-permutations.As everyone's known, the number of n-permutations is n!.According to their magnitude relatives, if we 阅读全文
posted @ 2013-12-09 18:35 y丫t 阅读(367) 评论(0) 推荐(0)