Factorial Trailing Zeroes
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该题想了好久写了几个版本都超时,怒看解答,发现这更多的是个数学题。突然很烦leetcode上那个叫@ts的人。好几题经过语言包装的数学题都是这哥们提供的。。。
其实该题剥开外衣,问的就是有几个5。。。因为只有5X2才能产生0,而2个数一定大于5的,所以有几个5就有几个0.
代码如下:
int trailingZeroes(int n) { int result = 0; while (n > 0) { result = n / 5 + result; n /= 5; } return result;}
0 0
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