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 9.2.1) (judge verdict: Accepted)

#include <stdio.h>
#include <stdbool.h>

int Mayor(int A, int B){
	return A>B? A: B;
};
bool Equal(int A, int B){
  	if(A == 5)
		return A == B;
 	return false;
};

int main(){

  	int A, B, C, Aux;

  	scanf("%d%d%d", &A, &B, &C);
	Aux = Mayor(C, Mayor(A, B));
  	if(Aux == 7 && (Equal(A, B) || Equal(B, C) || Equal (C, A)))
      printf("YES\n");
  	else
      printf("NO\n");

	return 0;
}