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<stdio.h>

int main(void){
    int a, b, c;
    int cntf = 0;
    int cnts = 0;

    scanf("%d %d %d", &a, &b, &c);

    if(a==5){
        cntf++;
    }
    if(b==5){
        cntf++;
    }
    if(c==5){
        cntf++;
    }

    if(a==7){
        cnts++;
    }
    if(b==7){
        cnts++;
    }
    if(c==7){
        cnts++;
    }

    if(cntf==2&&cnts==1){
        printf("YES\n");
    }else{
        printf("NO\n");
    }
    
    return 0;
}