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