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package com.javarush.task.task04.task0419;
/*
Максимум четырех чисел
*/
import java.io.*;
import java.util.*;
public class Solution {
public static void main(String[] args) throws Exception {
Scanner nomber = new Scanner(System.in);
int a = nomber.nextInt();
int b = nomber.nextInt();
int c = nomber.nextInt();
int d = nomber.nextInt();
if(a > b && a > c && a > d )
System.out.println(a);
else if(b > a && b > c && b > d)
System.out.println(b);
else if(c > a && c > b && c > d);
System.out.println(c);
if (d > a && d > b && d > c )
System.out.println(d);
//Если что-то равно другому
else if(a == b || a == c || a == d)
System.out.println(a);
else if(b == a || b == c || b == d)
System.out.println(b);
else if(c == a || c == b || c == d)
System.out.println(c);
else if(d == a || d == b || d == c)
System.out.println(d);
}
}