View Code of Problem 20

#include<string.h>
#include<math.h>
#include<stdio.h>
#include<ctype.h>
int main()
{
	int n;
	while(	scanf("%d",&n)!=EOF)
	{
		if(n%3!=0) printf("Yes\n");
		else printf("No\n");
	}
	return 0;
 }