View Code of Problem 20

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