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 check_num(int a, int n) {
    if(a==n) return 1;
    else return 0;
}

int main() {
    int A, B, C;
    scanf("%d %d %d", &A, &B, &C);

    int c5=0, c7=0;
    c5 += check_num(A, 5);
    c5 += check_num(B, 5);
    c5 += check_num(C, 5);
    c7 += check_num(A, 7);
    c7 += check_num(B, 7);
    c7 += check_num(C, 7);

    if((c5==2)&&(c7==1)) printf("YES\n");
    else printf("NO\n");

    return 0;

}