View Code of Problem 20

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


    
}