Sample, Java - rextester

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//'main' method must be in a class 'Rextester'.
//Compiler version 1.8.0_111
import java.io.*;
import java.util.*;
import java.lang.*;
class Rextester{
public static void main(String[] args) throws Exception {
        ArrayList<Integer> list0 = new ArrayList<>();
        ArrayList<Integer> list1 = new ArrayList<>();
        ArrayList<Integer> list2 = new ArrayList<>();
        ArrayList<Integer> list3 = new ArrayList<>();
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        for (int i = 0; i < 20; i++) {
            list0.add(Integer.parseInt(reader.readLine()));
        }
        for (int i = 0; i < list0.size(); i++) {
            if (list0.get(i) % 3 == 0) list1.add(list0.get(i));
            if (list0.get(i) % 2 == 0) list2.add(list0.get(i));
            if ((list0.get(i) % 3 != 0) & (list0.get(i) % 2 != 0)) list3.add(list0.get(i));
        }
        printList(list1);
        printList(list2);
        printList(list3);
    }

public static void printList(ArrayList<Integer> list) {
        for (int i = 0; i < list.size(); i++) {
            System.out.println(list.get(i));
        }
    }
}

[ - ] Show input
Compilation time: 0.73 sec, absolute running time: 0.14 sec, cpu time: 0.11 sec, memory peak: 18 Mb, absolute service time: 0,88 sec