import java.util.*;

public class Main {
    public static void main(String args[]) {
        Scanner scanner = new Scanner(System.in);
        int n = scanner.nextInt();
        String s = String.valueOf(n);
        if (s.charAt(0) == '7' || s.charAt(1) == '7' ||  s.charAt(2) == '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 scanner = new Scanner(System.in);
        int n = scanner.nextInt();
        String s = String.valueOf(n);
        if (s.charAt(0) == '7' || s.charAt(1) == '7' ||  s.charAt(2) == '7') {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
} Main public static void main(String args[]) {
        Scanner scanner = new Scanner(System.in);
        int n = scanner.nextInt();
        String s = String.valueOf(n);
        if (s.charAt(0) == '7' || s.charAt(1) == '7' ||  s.charAt(2) == '7') {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    } main {
        Scanner scanner = new Scanner(System.in);
        int n = scanner.nextInt();
        String s = String.valueOf(n);
        if (s.charAt(0) == '7' || s.charAt(1) == '7' ||  s.charAt(2) == '7') {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    } Scanner scanner = new Scanner(System.in); scanner new Scanner(System.in) int n = scanner.nextInt(); n scanner.nextInt() scanner.nextInt scanner String s = String.valueOf(n); s String.valueOf(n) String.valueOf String n if (s.charAt(0) == '7' || s.charAt(1) == '7' ||  s.charAt(2) == '7') {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        } s.charAt(0) == '7' || s.charAt(1) == '7' ||  s.charAt(2) == '7' s.charAt(0) == '7' || s.charAt(1) == '7' ||  s.charAt(2) == '7' s.charAt(0) == '7' s.charAt(0) s.charAt s 0 '7' s.charAt(1) == '7' s.charAt(1) s.charAt s 1 '7' s.charAt(2) == '7' s.charAt(2) s.charAt s 2 '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 scanner = new Scanner(System.in);
        int n = scanner.nextInt();
        String s = String.valueOf(n);
        if (s.charAt(0) == '7' || s.charAt(1) == '7' ||  s.charAt(2) == '7') {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
} public class Main {
    public static void main(String args[]) {
        Scanner scanner = new Scanner(System.in);
        int n = scanner.nextInt();
        String s = String.valueOf(n);
        if (s.charAt(0) == '7' || s.charAt(1) == '7' ||  s.charAt(2) == '7') {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
} Main
import java.util.*;

public class Main {
    public static void main(String args[]) {
        Scanner scanner = new Scanner(System.in);
        int n = scanner.nextInt();
        String s = String.valueOf(n);
        if (s.charAt(0) == '7' || s.charAt(1) == '7' ||  s.charAt(2) == '7') {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
}