import java.util.Scanner;

public class Main{ 
 public static void main(String[] args){
  
   Scanner scan = new Scanner(System.in);
   int input =scan.nextInt();
   
   int a=input%10;
   int b=input%100;
   int c=input/100;
   int i=0;
   if(a==7){
     i++;
   }else if(70<=b && b<80){
     i++;
   }else if(c==7){
     i++;
   }
   
   if(i==1){
  System.out.println("Yes\n");
   }
   else{
     System.out.println("No\n");
   }
     
 }
}
/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