What is wrong here with code?
package com.codegym.task.task07.task0721;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
/*
Min and max in arrays
*/
public class Solution {
public static void main(String[] args) throws IOException {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
int arr[]=new int[20];
int maximum = arr[0];
int minimum = arr.length-1;
for(int i=0; i<arr.length; i++){
arr[i] = Integer.parseInt(reader.readLine());
}
for (int i = 0; i < arr.length; i++) {
if (arr[i] > maximum)
maximum = arr[i];
}
for (int i = arr.length-1; i>-1; i--) {
if (arr[i] < minimum)
minimum = arr[i];
}
System.out.print(maximum + " " + minimum);
}
}