import java.util.*;
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
      
      int i = 0;
      
      int a = sc.nextInt();
      int b = sc.nextInt();
      int c = sc.nextInt();
      
      if(a==7){
        i++;
      }
            if(b==7){
        i++;
      }
            if(c==7){
        i++;
      }
      
      if(i == 1){
        System.out.println("YES");
      }else{
        System.out.println("NO");
      }
	}
}

/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz