import java.util.Scanner;

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

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