import java.util.*;

public class Main {

	public static void main(String[] args) {
	
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int N100 = N / 100;
		int N1 = N % 10;
		int N10 =( N - (N100 * 100 + N1) )/ 10;
		System.out.println(N100 == 7 || N10 == 7 || N1 == 7 ? "Yes" : "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