View Code of Problem 20

#include "stdio.h"
#include "math.h"
#include "string.h"

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