I think it is not a hard question which just add to different list by cases,but idk what's wrong with my code,need clear explanation.
package com.codegym.task.task07.task0713;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
/*
Playing Javarella
*/
public class Solution {
public static void main(String[] args) throws Exception {
//write your code here
ArrayList<Integer> list1 = new ArrayList<Integer>();
ArrayList<Integer> list2 = new ArrayList<Integer>();
ArrayList<Integer> list3 = new ArrayList<Integer>();
ArrayList<Integer> list4 = new ArrayList<Integer>();
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
for(int i = 0 ; i <20 ; i++){
list1.add(Integer.parseInt(reader.readLine()));
}
for(int i = 0 ; i <list1.size() ; i++){
if(i % 3 ==0 ){
list2.add(list1.get(i));
}
else if(i %2 ==0){
list3.add(list1.get(i));
}
else{
list4.add(list1.get(i));
}
}
printList(list2);
printList(list3);
printList(list4);
}
public static void printList(List<Integer> list) {
//write your code here
for(int i = 0 ; i < list.size() ; i ++){
System.out.println(list.get(i));
}
}
}