import java.util.*;

class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        String s = "" + N;

        if (s.indexOf('7') != -1)
            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();
        String s = "" + N;

        if (s.indexOf('7') != -1)
            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();
        String s = "" + N;

        if (s.indexOf('7') != -1)
            System.out.println("Yes");
        else
            System.out.println("No");
    } main {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        String s = "" + N;

        if (s.indexOf('7') != -1)
            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 String s = "" + N; s "" + N "" N if (s.indexOf('7') != -1)
            System.out.println("Yes");
        else
            System.out.println("No"); s.indexOf('7') != -1 s.indexOf('7') s.indexOf s '7' -1 1 System.out.println("Yes") System.out.println System.out System System.out "Yes" 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();
        String s = "" + N;

        if (s.indexOf('7') != -1)
            System.out.println("Yes");
        else
            System.out.println("No");
    }
}
