import java.util.Scanner;

public class Main{
  public static void main(String args[]){
    Scanner scan = new Scanner(System.in);
    int H, J, I;
    int n = scan.nextInt();
    
    H = n/100;
    J = (n - (H*100))/10;
    I = (n - (H*100) - (J*10));
         
    if(H == 7||J == 7||I == 7){
      System.out.print("Yes");
    } else {
      System.out.print("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