import java.util.Scanner;

public class Main{
  public static void main(String[] args){
    
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    
    int a,b,c;
    
    a = N / 100;
    b = (N - a*100) / 10;
    c = N - a*100 - b*10;
    
    if(a == 7 || b == 7 || c == 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