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(){
    char str[15];
    int target[3] = {7,5,3};
    scanf("%s",str);

    int len=0,ans=1000;

    for(int i=0;str[i]!='\0';i++)   len++;

    for(int i=0;i<=len-3;i++){
        int cost=0;
        for(int j=0;j<3;j++){
            int sa = (target[j]-(str[j+i]-'0'));

            if(j==0)    sa*=100;
            else if(j==1)   sa*=10;

            cost+=abs(sa);

        }
        if(ans>cost)    ans = cost;
    }
    printf("%d\n",ans);
}