package olimpiada;
import java.util.Scanner;
public class problema1 {
public static void main(String[] args) {
// entrada: 45 23 87 23 12 34\n
// saĆda: 87\n "println"
Scanner scan = new Scanner(System.in);
int max = 0;
String linha = scan.nextLine();
String[] vetor = linha.split(" ");
for (int i = 0; i < vetor.length; i++) {
int num = Integer.parseInt(vetor[i]);
if (num > max) max = num;
}
System.out.println(max);
}
}