import java.util.Scanner;

public class Main {
    public static void main(String[] args) throws Exception {

        Scanner scan = new Scanner(System.in);
		int n = Integer.parseInt(scan.nextLine());
		
		if(n % 100 % 10 == 7){
		    System.out.println("Yes");
		}else if(n % 100 / 10 == 7){
		    System.out.println("Yes");
		}else if(n / 100 == 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