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: Wrong Answer)

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

int main() {
  int A, B, C;
  cin >> A >> B >> C;
  vector<int> vec(3);
  vec.at(0) = A;
  vec.at(1) = B;
  vec.at(2) = C;
  int sevs = 0;
  int fives = 0;
  for (int i : vec) {
    if (i == 5) {
      fives++;
    } else if (i == 7) {
      sevs++;
    }
  }
  if (fives == 2 && sevs == 1) {
    cout << "YES" << endl;
  } else {
    cout  << "N0" << endl;
  }

  
  
  
  return 0;
}