题解 | #阶乘末尾0的数量#
阶乘末尾0的数量
https://www.nowcoder.com/practice/aa03dff18376454c9d2e359163bf44b8
import java.util.*;
public class Solution {
/**
* the number of 0
* @param n long长整型 the number
* @return long长整型
*/
public long thenumberof0 (long n) {
long count_5 = 0 ;//1~n中能分解的5的倍数
long base = 5 ;//5,25,125
while(n >= base) {
count_5 += n / base ;
base *= 5 ;
}
return count_5 ;
}
}
