import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        boolean hasNextInt = scanner.hasNextInt();
        int x = scanner.nextInt();
        if(hasNextInt) {
            while(x > 0) {
                if(x % 10 == 7) {
                    System.out.println("Yes");
                    break;
                } else {
                    x /= 10;
                }
                if(x == 0) {
                    System.out.println("No");
                }
            }
        }
        scanner.close();
    }
}
/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