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package etc.ali.q2;
/**
* 找因子直接遍历（o(n)超时）
*/
public class Solution {
public int trailingZeroes(int num) {
int rs = 0;
for (int i = 1; i <= num; i++) {
int j = i;
while (j % 5 == 0) {
rs++;
j /= 5;
}
return rs;
