import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scan= new Scanner(System.in);
        int n= scan.nextInt();
        String s=Integer.toString(n);
        for(int i=0;i<s.length();i++){
            if(s.charAt(i)=='7'){
                System.out.println("Yes");
                return;
            }
        }
        System.out.println("No");
    }
} import java.util.Scanner; Scanner java.util public class Main {
    public static void main(String[] args) {
        Scanner scan= new Scanner(System.in);
        int n= scan.nextInt();
        String s=Integer.toString(n);
        for(int i=0;i<s.length();i++){
            if(s.charAt(i)=='7'){
                System.out.println("Yes");
                return;
            }
        }
        System.out.println("No");
    }
} Main public static void main(String[] args) {
        Scanner scan= new Scanner(System.in);
        int n= scan.nextInt();
        String s=Integer.toString(n);
        for(int i=0;i<s.length();i++){
            if(s.charAt(i)=='7'){
                System.out.println("Yes");
                return;
            }
        }
        System.out.println("No");
    } main {
        Scanner scan= new Scanner(System.in);
        int n= scan.nextInt();
        String s=Integer.toString(n);
        for(int i=0;i<s.length();i++){
            if(s.charAt(i)=='7'){
                System.out.println("Yes");
                return;
            }
        }
        System.out.println("No");
    } Scanner scan= new Scanner(System.in); scan new Scanner(System.in) int n= scan.nextInt(); n scan.nextInt() scan.nextInt scan String s=Integer.toString(n); s Integer.toString(n) Integer.toString Integer n for(int i=0;i<s.length();i++){
            if(s.charAt(i)=='7'){
                System.out.println("Yes");
                return;
            }
        } int i=0; int i=0; i 0 i<s.length() i s.length() s.length s i++ i++ i {
            if(s.charAt(i)=='7'){
                System.out.println("Yes");
                return;
            }
        } {
            if(s.charAt(i)=='7'){
                System.out.println("Yes");
                return;
            }
        } if(s.charAt(i)=='7'){
                System.out.println("Yes");
                return;
            } s.charAt(i)=='7' s.charAt(i) s.charAt s i '7' {
                System.out.println("Yes");
                return;
            } System.out.println("Yes") System.out.println System.out System System.out "Yes" return; 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 scan= new Scanner(System.in);
        int n= scan.nextInt();
        String s=Integer.toString(n);
        for(int i=0;i<s.length();i++){
            if(s.charAt(i)=='7'){
                System.out.println("Yes");
                return;
            }
        }
        System.out.println("No");
    }
} public class Main {
    public static void main(String[] args) {
        Scanner scan= new Scanner(System.in);
        int n= scan.nextInt();
        String s=Integer.toString(n);
        for(int i=0;i<s.length();i++){
            if(s.charAt(i)=='7'){
                System.out.println("Yes");
                return;
            }
        }
        System.out.println("No");
    }
} Main
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scan= new Scanner(System.in);
        int n= scan.nextInt();
        String s=Integer.toString(n);
        for(int i=0;i<s.length();i++){
            if(s.charAt(i)=='7'){
                System.out.println("Yes");
                return;
            }
        }
        System.out.println("No");
    }
}
