import java.util.Scanner;
public class Main{
  public static void main(String[] args){
    Scanner sc=new Scanner(System.in);
    int n=sc.nextInt();
    int h=n/100;
    int i=n%100;
    int j=i/10;
    int k=i%10;
    if(100<=n&&n<=999){
      if((h==7)||(j==7)||(k==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