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<string.h>
#include<math.h>
int main()
{
    int length=0,temp[999],i,k,t,flag;
    char digit[999];
    gets(digit);
    length=strlen(digit);
    for(i=0; i<=length-3; i++)
    {
        temp[i]=abs((digit[i]-'0')*100+(digit[i+1]-'0')*10+(digit[i+2]-'0')-753);
    }
    for(t=0; t<=i; t++)
    {
        flag=1;
        for(k=0;k<=i;k++)
            if(temp[t]>temp[k]){flag=0;break;}
        if(flag==1)break;
    }
    printf("%d",temp[t]);
}