import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int value = n / 10 * 10;
        int flag = 0;
        if (n - value == 7) {
            flag = 1;
        }

        value = n / 10;
        value = value / 10 * 10;
        if (n / 10 - value == 7) {
            flag = 1;
        }

        if (n / 100 == 7) {
            flag = 1;
        }

        if (flag == 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