Problem:
Score : 100 points

Problem Statement

Shichi-Go-San (literally "Seven-Five-Three") is a traditional event in a certain country to celebrate the growth of seven-, five- and three-year-old children.

Takahashi is now X years old. Will his growth be celebrated in Shichi-Go-San this time?

Constraints

1 ≤ X ≤ 9

X is an integer.

Input

Input is given from Standard Input in the following format:

X

Output

If Takahashi's growth will be celebrated, print YES; if it will not, print NO.

Sample Input 1

5

Sample Output 1

YES

The growth of a five-year-old child will be celebrated.

Sample Input 2

6

Sample Output 2

NO

See you next year.

Solution in C (GCC 5.4.1) (judge verdict: Wrong Answer)

#include<stdio.h>
#include<math.h>
int main()
{
    int Num;
    int numBox[9],expo,judge,ans;
    scanf("%d",&Num);
    for (;Num>=0;Num--)
    {
        judge=1;
        for(expo=0;expo<9;expo++)
            numBox[expo]=Num/pow(10,expo);
        for(expo=0;expo<9;expo++)
        {
            if(!(numBox[expo]==3||numBox[expo]==5||numBox[expo]==7))
            {
                judge=0;
                break;
            }
        }
    if(judge)
        ans++;
    }
    printf("%d",ans);
    return 0;
}