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

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

        
    }
}