View Code of Problem 20

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