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 ; } }