import java.util.*;
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
      	int x = a % 10;
      	int y = (a % 100 - x)/10;
       	int z = a/100;
		if(x==7||y==7) {
          System.out.println("Yes");
        }
   	    else if(z==7) {
          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