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>

void exchange(char str[][100], int i, int j);

int main(void)
{
	char str[100][100];
	int i, j, k = 0, N, L;
	
	scanf("%d%d", &N, &L);
	for(i = 0; i < N; i++) {
		scanf("%s", str[i]);
	}
	for(i = 0; i < N; i++) {
		for(j = i + 1; j < N; j++) {
			while(str[i][k] == str[j][k]) {
				k++;
			}
			if(str[i][k] > str[j][k]) {
				exchange(str, i, j);
			}
			k = 0;
		}
		printf("%s", str[i]);
		j = 0;
	}
	return 0;
}
void exchange(char str[][100], int i, int j)
{
	char copy[100];
	int k;
	
	for(k = 0; str[i][k] != '\0'; k++) {
		copy[k] = str[i][k];
		str[i][k] = str[j][k];
		str[j][k] = copy[k];
	}
}