package com.mail.lenka949;

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Paths;

public class Main {

	public static void main(String[] args) {
		// TODO Auto-generated method stub

        int k;
		try {
			k = Files.lines(Paths.get("nums.txt"))
			        .filter(n -> n != null)
					.mapToInt(n -> (int) Integer.parseInt(n))
					.reduce(0, (a, b) -> Integer.max(a, b));
		} catch (IOException e) {
			e.printStackTrace();
			k = -1;
		}
		System.out.println(k);

	}

}