помогите разобраться...
package com.javarush.task.task07.task0721;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
/*
Минимаксы в массивах
*/
public class Solution {
public static void main(String[] args) throws IOException {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
int [] numbers = new int [20];
for (int i = 0; i < 20; i++)
{
int number = Integer.parseInt(reader.readLine());
numbers[i] = numbers[number];
}
int maximum = numbers[0];
int minimum = numbers[0];
for (int i = 0; i<20; i++){
if (maximum<numbers[i]){
maximum=numbers[i];
}
if (minimum>numbers[i]){
minimum = numbers[i];
}
}
//напишите тут ваш код
System.out.print(maximum + " " + minimum);
}
}