import java.util.Scanner;
 
public class Main { //クラス名はMain
    public static void main(String[] args) {
    Scanner in = new Scanner(System.in);
      int N = in.nextInt();
      int hundreds = N / 100;
      int tens = (N / 10) % 10; // (n % 100) / 10
      int ones = N % 10;
       if ((hundreds == 7) || (tens == 7) || (ones == 7))
            System.out.println("Yes");
       else
            System.out.println("No");
        
  
    }
} import java.util.Scanner; Scanner java.util public class Main { //クラス名はMain
    public static void main(String[] args) {
    Scanner in = new Scanner(System.in);
      int N = in.nextInt();
      int hundreds = N / 100;
      int tens = (N / 10) % 10; // (n % 100) / 10
      int ones = N % 10;
       if ((hundreds == 7) || (tens == 7) || (ones == 7))
            System.out.println("Yes");
       else
            System.out.println("No");
        
  
    }
} Main public static void main(String[] args) {
    Scanner in = new Scanner(System.in);
      int N = in.nextInt();
      int hundreds = N / 100;
      int tens = (N / 10) % 10; // (n % 100) / 10
      int ones = N % 10;
       if ((hundreds == 7) || (tens == 7) || (ones == 7))
            System.out.println("Yes");
       else
            System.out.println("No");
        
  
    } main {
    Scanner in = new Scanner(System.in);
      int N = in.nextInt();
      int hundreds = N / 100;
      int tens = (N / 10) % 10; // (n % 100) / 10
      int ones = N % 10;
       if ((hundreds == 7) || (tens == 7) || (ones == 7))
            System.out.println("Yes");
       else
            System.out.println("No");
        
  
    } Scanner in = new Scanner(System.in); in new Scanner(System.in) int N = in.nextInt(); N in.nextInt() in.nextInt in int hundreds = N / 100; hundreds N / 100 N 100 int tens = (N / 10) % 10; tens (N / 10) % 10 (N / 10) N 10 10 int ones = N % 10; ones N % 10 N 10 if ((hundreds == 7) || (tens == 7) || (ones == 7))
            System.out.println("Yes");
       else
            System.out.println("No"); (hundreds == 7) || (tens == 7) || (ones == 7) (hundreds == 7) || (tens == 7) || (ones == 7) (hundreds == 7) hundreds 7 (tens == 7) tens 7 (ones == 7) ones 7 System.out.println("Yes") System.out.println System.out System System.out "Yes" System.out.println("No") System.out.println System.out System System.out "No" String[] args args public class Main { //クラス名はMain
    public static void main(String[] args) {
    Scanner in = new Scanner(System.in);
      int N = in.nextInt();
      int hundreds = N / 100;
      int tens = (N / 10) % 10; // (n % 100) / 10
      int ones = N % 10;
       if ((hundreds == 7) || (tens == 7) || (ones == 7))
            System.out.println("Yes");
       else
            System.out.println("No");
        
  
    }
} public class Main { //クラス名はMain
    public static void main(String[] args) {
    Scanner in = new Scanner(System.in);
      int N = in.nextInt();
      int hundreds = N / 100;
      int tens = (N / 10) % 10; // (n % 100) / 10
      int ones = N % 10;
       if ((hundreds == 7) || (tens == 7) || (ones == 7))
            System.out.println("Yes");
       else
            System.out.println("No");
        
  
    }
} Main
import java.util.Scanner;
 
public class Main { //クラス名はMain
    public static void main(String[] args) {
    Scanner in = new Scanner(System.in);
      int N = in.nextInt();
      int hundreds = N / 100;
      int tens = (N / 10) % 10; // (n % 100) / 10
      int ones = N % 10;
       if ((hundreds == 7) || (tens == 7) || (ones == 7))
            System.out.println("Yes");
       else
            System.out.println("No");
        
  
    }
}