View Code of Problem 20

#include<stdio.h>
#include<math.h>
#include<string.h>
#include<stdlib.h>
//#include<algorithm>
//#include <bits/stdc++.h>

int main() {
	int n;
	while(scanf("%d",&n)!=EOF) {
		if(n%3==0) {
			printf("No\n");
		} else {
			printf("Yes\n");
		}
	}

}