import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.util.*;

import javax.swing.JOptionPane;

public class Laborator3
{
	 public static void main(String[] args)
	 {
		FileReader fr = null;
		BufferedReader bfr = null;

		int max = 0;

		try {
			fr = new FileReader("fisier.txt");
			bfr = new BufferedReader(fr);

			for(;;)
			{
				String linie = bfr.readLine();
				if (linie == null) break; // s-a terminat fisierul

				StringTokenizer tk = new StringTokenizer(linie);

				for (int i = 0; i < tk.countTokens(); i++)
				{
					int nr = Integer.parseInt(tk.nextToken());

					if (nr > max)
					{
						max = nr;
					}
				}
			}

			fr.close();
			bfr.close();

			if (max != 0)
			{
				System.out.println(max);
			}
			else
			{
				System.out.println("Nu exista");
			}

		} catch(IOException e) {
			System.out.println(e);
			System.exit(1);
		}

	 }
}