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() {
	int N;
	int flag5 = 0;
	int flag7 = 0;
	for (int i = 0;i < 3;i++) {
		cin >> N;
		if (N == 5) {
			flag5++;
		}
		else if (N == 7) {
			flag7++;
		}
	}
	if (flag5 == 2 && flag7 == 1) {
		cout << "YES" << endl;
	}
	else {
		cout << "NO" << endl;
	}

	return 0;
}