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 (Clang 3.8.0) (judge verdict: Wrong Answer)

#include <stdio.h>
#include <string.h>
#include <math.h>
#include <stdlib.h>

int main(void){
  long int S,number,digit;
  scanf("%ld",&S);
  number = S;
  while(number!=0){
   number = number/10;
   ++digit;
  }
  int s[digit];
  for(int i = 0;i < digit;i++){
    s[i] = S/((int)pow(10, digit-i-1));
    S = S%((int)pow(10, digit-i-1));
  }
  int min = 753,X = 0;
  for(int i = 0;i < digit - 2; i++){
    X = s[i]*100 + s[i+1]*10 + s[i+2];
    if(min > abs(753 - X)){
      min = abs(753 - X);
    }
  }
  printf("%d\n",min);
  return 0;
}