[SPOJ] FCTRL – Factorial | 书脊



[SPOJ] FCTRL – Factorial | 书脊

题目大意: 给一个数字n,问你n!后边有多少个0.

分析: 这就是Leetcode那个Factorial Trailing Zeroes 我们看n!是由多少个5的倍数组成的. 就知道后边有几个0. 纯数学题. 没意思


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