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++ (GCC 5.4.1) (judge verdict: Accepted)

#include<iostream>
using namespace std;

int main(){
  int a, b, c = 0;
  int count5, count7 = 0; 
  cin >> a >> b >> c;
  
  if(a == 5){
    count5 += 1;
  }
  else if(a == 7){
    count7 += 1;
  }
  
  if(b == 5){
    count5 += 1;
  }
  else if(b == 7){
    count7 += 1;
  }
  
  if(c == 5){
    count5 += 1;
  }
  else if(c == 7){
    count7 += 1;
  }
  
  if(count5 == 2 && count7 == 1){
  	cout << "YES" << endl;
  }
  else{
  	cout << "NO" << endl;
  }
  return 0;
}