my solution is a mess, just need someone to explain to me what is required of me.
package com.codegym.task.task07.task0720;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
/*
Shuffled just in time
*/
public class Solution {
public static void main(String[] args) throws IOException {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
ArrayList<String> list = new ArrayList<String>();
int N = Integer.parseInt(reader.readLine());
int M = Integer.parseInt(reader.readLine());
//write your code here
for(int i = 0; i < N; i++){
list.add(reader.readLine());
}
for(int i = 0; i < M; i++){
String a = reader.readLine();
list.add(a);
if(i==(M-1)){
String temp =list.get(N);
list.remove(N);
list.add(temp);
}
}
for (String strings: list){
System.out.println(strings);
}
}
}