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: Wrong Answer)

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define N 100

int compare(const void *a, const void *b) {
	char *s = *(char **) a;
	char *t = *(char **) b;

	return strcmp(s, t);
}

int main() {
	static char ss[N][N + 1], *tt[N];
	int n, l, i;

	scanf("%d%d", &n, &l);
	for (i = 0; i < n; i++) {
		scanf("%s", ss[i]);
		tt[i] = ss[i];
	}
	qsort(tt, n, sizeof *tt, compare);
	for (i = 0; i < n; i++)
		printf("%s", tt[i]);
	printf("\n");
	return 0;
}