import java.util.Scanner;

public class Main {

    public static void main(String[] args) {

        Scanner userInput = new Scanner(System.in);

        String a = userInput.nextLine();
        String b = userInput.nextLine();
        String c = userInput.nextLine();
        String d = userInput.nextLine();
        String e = userInput.nextLine();

        double ad = Double.parseDouble(a);
        double bd = Double.parseDouble(b);
        double cd = Double.parseDouble(c);
        double dd = Double.parseDouble(c);
        double ed = Double.parseDouble(c);

        String result = a;

        if (bd > ad) {
            result = b;
        }

        if (cd > bd) {
            result = c;
        }

        if (dd > cd) {
            result = d;
        }

        if (ed > dd) {
            result = e;
        }

        System.out.println(result);
    }
}