View Code of Problem 20

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