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 a1,b2,c3,five=0,seven=0;
    scanf("%d%d%d",&a1,&b2,&c3);
    if(a1==5){
        five++;
    }else if(a1==7){
        seven++;
    }
    if(b2==5){
        five++;
    }else if(b2==7){
        seven++;
    }
    if(c3==5){
        five++;
    }else if(c3==7){
        seven++;
    }
    if(five==2||seven==1){
        printf("YES");
    }else{
        printf("NO");
    }
    return 0;
	}