import java.util.Scanner;
public class Main{
  public static void main(String args[]){
 Scanner enter = new Scanner(System.in);
  int n = enter.nextInt();
  String s = String.valueOf(n);
  
  if(s.contains("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 enter = new Scanner(System.in);
  int n = enter.nextInt();
  String s = String.valueOf(n);
  
  if(s.contains("7")){
    System.out.println("Yes");
  }
  else{
    System.out.println("No");
  }
  }
} Main public static void main(String args[]){
 Scanner enter = new Scanner(System.in);
  int n = enter.nextInt();
  String s = String.valueOf(n);
  
  if(s.contains("7")){
    System.out.println("Yes");
  }
  else{
    System.out.println("No");
  }
  } main {
 Scanner enter = new Scanner(System.in);
  int n = enter.nextInt();
  String s = String.valueOf(n);
  
  if(s.contains("7")){
    System.out.println("Yes");
  }
  else{
    System.out.println("No");
  }
  } Scanner enter = new Scanner(System.in); enter new Scanner(System.in) int n = enter.nextInt(); n enter.nextInt() enter.nextInt enter String s = String.valueOf(n); s String.valueOf(n) String.valueOf String n if(s.contains("7")){
    System.out.println("Yes");
  }
  else{
    System.out.println("No");
  } s.contains("7") s.contains s "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 enter = new Scanner(System.in);
  int n = enter.nextInt();
  String s = String.valueOf(n);
  
  if(s.contains("7")){
    System.out.println("Yes");
  }
  else{
    System.out.println("No");
  }
  }
} public class Main{
  public static void main(String args[]){
 Scanner enter = new Scanner(System.in);
  int n = enter.nextInt();
  String s = String.valueOf(n);
  
  if(s.contains("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 enter = new Scanner(System.in);
  int n = enter.nextInt();
  String s = String.valueOf(n);
  
  if(s.contains("7")){
    System.out.println("Yes");
  }
  else{
    System.out.println("No");
  }
  }
}