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 <bits/stdc++.h>
using namespace std;

int main() {
  vector<int> A(3);
  cin >> A.at(0) >> A.at(1) >> A.at(2);
  int f=0;
  int s=0;
    for(int i=0;i<3;i++){
      if(A.at(i) == 5){
        f +=1;
      }
      else if(A.at(i) == 7){
        s += 1;
      }
    }
  
    if(f == 2 && s == 1){
      cout << "YES" << endl;
    }
    else{
      cout << "NO" << endl;
    }
  
  return 0;
}