Problem:
Score : 100 points

Problem Statement

Iroha loves Haiku. Haiku is a short form of Japanese poetry. A Haiku consists of three phrases with 5, 7 and 5 syllables, in this order.

To create a Haiku, Iroha has come up with three different phrases. These phrases have A, B and C syllables, respectively. Determine whether she can construct a Haiku by using each of the phrases once, in some order.

Constraints

1≦A,B,C≦10

Input

The input is given from Standard Input in the following format:

A B C

Output

If it is possible to construct a Haiku by using each of the phrases once, print YES (case-sensitive). Otherwise, print NO.

Sample Input 1

5 5 7

Sample Output 1

YES

Using three phrases of length 5, 5 and 7, it is possible to construct a Haiku.

Sample Input 2

7 7 5

Sample Output 2

NO

Solution in C++14 (GCC 5.4.1) (judge verdict: Accepted)

#include<iostream>

using namespace std;

int count(int d);
int N = 0;
int M = 0;

int main(){
  
  int a,b,c;
  cin >> a >> b >> c;
  
  count(a);
  count(b);
  count(c);

  if(N == 2){
    if(M ==1){
      std::cout << "YES" << std::endl;
    }else{
      std::cout << "NO" << std::endl;
    }
   }else{
       std::cout << "NO" << std::endl;
   }
    return 0;
}

int count (int d){
    if(d == 5){
      N++;
    }else if(d==7){
      M++;
    }
    return 0;
}