хелп
package com.javarush.task.task07.task0720;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
/*
Перестановочка подоспела
*/
public class Solution {
public static void main(String[] args) throws IOException {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
ArrayList<String> strings = new ArrayList<>();
int n =Integer.parseInt(reader.readLine()), m=Integer.parseInt(reader.readLine());
for (int i = 0; i <n ; i++) {
strings.add(reader.readLine());
}
for (int i = 0; i <m ; i++) {
strings.set(strings.size()-1,strings.get(i));
}
for (int i = 0; i <strings.size() ; i++) {
System.out.println(strings.get(i));
}
}
}