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 main(){
    int a, b, c; cin >> a >> b >> c;
    int cnt_5 = 0, cnt_7=0;
    if(a == 5) cnt_5++;
    if(b == 5) cnt_5++;
    if(c == 5) cnt_5++;
    if(a == 7) cnt_7++;
    if(b == 7) cnt_7++;
    if(c == 7) cnt_7++;
    if(cnt_5 == 2 && cnt_7 == 1)
        cout << "YES" << endl;
    else
        cout << "NO" << endl;
    return 0;
}