import java.util.*;
 public class Main {
	public static void main(String[] args){
      Scanner sc = new Scanner(System.in);

      int N = sc.nextInt();
   

      if(N / 100 == 7 || N % 100 / 10 == 7 || N % 10 == 7){
         System.out.println("Yes");
      }else{
         System.out.println("No");
      }
     
   }
 } import java.util.*; util.* java public class Main {
	public static void main(String[] args){
      Scanner sc = new Scanner(System.in);

      int N = sc.nextInt();
   

      if(N / 100 == 7 || N % 100 / 10 == 7 || N % 10 == 7){
         System.out.println("Yes");
      }else{
         System.out.println("No");
      }
     
   }
 } Main public static void main(String[] args){
      Scanner sc = new Scanner(System.in);

      int N = sc.nextInt();
   

      if(N / 100 == 7 || N % 100 / 10 == 7 || N % 10 == 7){
         System.out.println("Yes");
      }else{
         System.out.println("No");
      }
     
   } main {
      Scanner sc = new Scanner(System.in);

      int N = sc.nextInt();
   

      if(N / 100 == 7 || N % 100 / 10 == 7 || N % 10 == 7){
         System.out.println("Yes");
      }else{
         System.out.println("No");
      }
     
   } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int N = sc.nextInt(); N sc.nextInt() sc.nextInt sc if(N / 100 == 7 || N % 100 / 10 == 7 || N % 10 == 7){
         System.out.println("Yes");
      }else{
         System.out.println("No");
      } N / 100 == 7 || N % 100 / 10 == 7 || N % 10 == 7 N / 100 == 7 || N % 100 / 10 == 7 || N % 10 == 7 N / 100 == 7 N / 100 N 100 7 N % 100 / 10 == 7 N % 100 / 10 N % 100 N 100 10 7 N % 10 == 7 N % 10 N 10 7 {
         System.out.println("Yes");
      } System.out.println("Yes") System.out.println System.out System System.out "Yes" {
         System.out.println("No");
      } System.out.println("No") System.out.println System.out System System.out "No" String[] args args public class Main {
	public static void main(String[] args){
      Scanner sc = new Scanner(System.in);

      int N = sc.nextInt();
   

      if(N / 100 == 7 || N % 100 / 10 == 7 || N % 10 == 7){
         System.out.println("Yes");
      }else{
         System.out.println("No");
      }
     
   }
 } public class Main {
	public static void main(String[] args){
      Scanner sc = new Scanner(System.in);

      int N = sc.nextInt();
   

      if(N / 100 == 7 || N % 100 / 10 == 7 || N % 10 == 7){
         System.out.println("Yes");
      }else{
         System.out.println("No");
      }
     
   }
 } Main
import java.util.*;
 public class Main {
	public static void main(String[] args){
      Scanner sc = new Scanner(System.in);

      int N = sc.nextInt();
   

      if(N / 100 == 7 || N % 100 / 10 == 7 || N % 10 == 7){
         System.out.println("Yes");
      }else{
         System.out.println("No");
      }
     
   }
 }