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