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()
{
	int num[3] = {};
	int fiveCount = 0;
	int sevenCount = 0;
	char* result = "";

	scanf("%d %d %d", &num[0], &num[1], &num[2]);

	for (int i = 0; i < 3; i++)
	{
		if (num[i] == 5) fiveCount++;
		if (num[i] == 7) sevenCount++;
	}

	result = (fiveCount == 2 && sevenCount == 1) ? "YES" : "NO";
	printf("%s", result);

	return 0;
}