package array;

import java.util.Arrays;

import java.util.Scanner;

import java.util.concurrent.ConcurrentHashMap;

public class GrowableArray {

private static Object[] ele= {};

static int size=0;

public static void main(String[] args) {

Scanner sc=new Scanner(System.in);

for(int i=0;i<5;i++) {

if(add(sc.next())) {

System.out.println(Arrays.toString(ele));

}

}

System.out.println(Arrays.toString(ele));

}

public static boolean add(Object element) {

return add(element, size);

}

private static boolean add(Object el,int s) {

if (s == ele.length) {

if(checkDuplicate(el)) {

ele = grow();

ele[s] = el;

// System.out.println(Arrays.toString(ele));

size = s + 1;

return true;

}

}

return false;

}

private static Object[] grow() {

return copy(size+1);

}

private static Object[]copy(int size){

return ele=Arrays.copyOf(ele,size );

}

private static boolean checkDuplicate(Object e) {

for(int i=0;i<ele.length;i++) {

if(e.equals(ele[i])) {

return false;

}

}

return true;

}

}