import java.util.Scanner;
 
public class Main {
	public static void main(String[] args) {
      Scanner sc = new Scanner(System.in);
      int N = sc.nextInt();
      
      int handred = N/100;
      int ten = (N/10)%10;
      int one = N%10;
      
    if(handred==7){
        System.out.println("Yes");
      }
       else if(ten==7){
        System.out.println("Yes");
      }
      else if(one==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