import java.util.*;
class Main {
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int n1,n2,n3;
        n1 = n/100;
        n2 = (n-n1*100)/10;
        n3 = (n-n1*100-n2*10);
        if(n1==7||n2==7||n3==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 n1,n2,n3;
        n1 = n/100;
        n2 = (n-n1*100)/10;
        n3 = (n-n1*100-n2*10);
        if(n1==7||n2==7||n3==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 n1,n2,n3;
        n1 = n/100;
        n2 = (n-n1*100)/10;
        n3 = (n-n1*100-n2*10);
        if(n1==7||n2==7||n3==7){
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
        } main {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int n1,n2,n3;
        n1 = n/100;
        n2 = (n-n1*100)/10;
        n3 = (n-n1*100-n2*10);
        if(n1==7||n2==7||n3==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 n1 n1 n2 n2 n3; n3 n1 = n/100 n1 n/100 n 100 n2 = (n-n1*100)/10 n2 (n-n1*100)/10 (n-n1*100) n n1*100 n1 100 10 n3 = (n-n1*100-n2*10) n3 (n-n1*100-n2*10) n-n1*100-n2*10 n n1*100 n1 100 n2*10 n2 10 if(n1==7||n2==7||n3==7){
            System.out.println("Yes");
        } else {
            System.out.println("No");
        } n1==7||n2==7||n3==7 n1==7||n2==7||n3==7 n1==7 n1 7 n2==7 n2 7 n3==7 n3 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 n1,n2,n3;
        n1 = n/100;
        n2 = (n-n1*100)/10;
        n3 = (n-n1*100-n2*10);
        if(n1==7||n2==7||n3==7){
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
        }
        }
