Autoboxing Trap

Lab Java Intermediate 20 points

Read n integers into a List<Integer> and a value x. Call list.remove(Integer.valueOf(x)) to remove the value x (first occurrence), then list.remove(0) to remove the item at index 0. Print the list after each step.

Input

n, the integers, then x.

Output

Two lines.

Example

Input

5
10 20 30 20 40
20

Output

[10, 30, 20, 40]
[30, 20, 40]

Sample input available Sample output available

Editor

Java

Hints

remove(int) removes by index; remove(Object) removes by value.

Integer.valueOf(x) makes it an object.

Solution explanation

Autoboxing converts between int and Integer automatically - which makes this overload easy to get wrong.

Show solution

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        List<Integer> list = new ArrayList<Integer>();
        for (int i = 0; i < n; i++) {
            list.add(sc.nextInt());
        }
        int x = sc.nextInt();
        list.remove(Integer.valueOf(x));
        System.out.println(list);
        list.remove(0);
        System.out.println(list);
    }
}

Output

Answer