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>
#include<stdlib.h>
int main(){
  int num_5,num_7;
  int i;
  char str[3][10];
  num_5=num_7=0;
  
  scanf("%s",str[0]);
  scanf("%s",str[1]);
  scanf("%s",str[2]);
  
  for(i=0;i<3;i++){
   	if(atoi(str[i])==5){
      	num_5++;
  	}else if(atoi(str[i])==7){
    	num_7++;
    }
  }
  
  if(num_5==2&&num_7==1){
  	printf("YES\n");
  }else{
  	printf("NO\n");
  }
  
  return 0;
}