import java.util.*;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        sc.close();
        String res = "No";
        if (n / 100 == 7)  res = "Yes";
        if ((n % 100) / 10 == 7) res = "Yes";
        if ((n % 100) % 10 == 7) res = "Yes";

        System.out.println(res);
    }
} 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();
        String res = "No";
        if (n / 100 == 7)  res = "Yes";
        if ((n % 100) / 10 == 7) res = "Yes";
        if ((n % 100) % 10 == 7) res = "Yes";

        System.out.println(res);
    }
} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        sc.close();
        String res = "No";
        if (n / 100 == 7)  res = "Yes";
        if ((n % 100) / 10 == 7) res = "Yes";
        if ((n % 100) % 10 == 7) res = "Yes";

        System.out.println(res);
    } main {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        sc.close();
        String res = "No";
        if (n / 100 == 7)  res = "Yes";
        if ((n % 100) / 10 == 7) res = "Yes";
        if ((n % 100) % 10 == 7) res = "Yes";

        System.out.println(res);
    } 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 String res = "No"; res "No" if (n / 100 == 7)  res = "Yes"; n / 100 == 7 n / 100 n 100 7 res = "Yes" res "Yes" if ((n % 100) / 10 == 7) res = "Yes"; (n % 100) / 10 == 7 (n % 100) / 10 (n % 100) n 100 10 7 res = "Yes" res "Yes" if ((n % 100) % 10 == 7) res = "Yes"; (n % 100) % 10 == 7 (n % 100) % 10 (n % 100) n 100 10 7 res = "Yes" res "Yes" System.out.println(res) System.out.println System.out System System.out res String[] args args public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        sc.close();
        String res = "No";
        if (n / 100 == 7)  res = "Yes";
        if ((n % 100) / 10 == 7) res = "Yes";
        if ((n % 100) % 10 == 7) res = "Yes";

        System.out.println(res);
    }
} public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        sc.close();
        String res = "No";
        if (n / 100 == 7)  res = "Yes";
        if ((n % 100) / 10 == 7) res = "Yes";
        if ((n % 100) % 10 == 7) res = "Yes";

        System.out.println(res);
    }
} 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();
        String res = "No";
        if (n / 100 == 7)  res = "Yes";
        if ((n % 100) / 10 == 7) res = "Yes";
        if ((n % 100) % 10 == 7) res = "Yes";

        System.out.println(res);
    }
}