import java.util.Arrays;

public class ArrayManipulation {

    public static void main(String[] args) {
       
        int[] arr = {1,2,3,4,5};
        System.out.println(Arrays.toString(reverseArray(arr)));
        System.out.println(Arrays.toString(removeFirst(arr)));
        System.out.println(Arrays.toString(removeLast(arr)));
        System.out.println(Arrays.toString(squareEach(arr)));
    }

    public static int[] reverseArray(int[] arr) {

        for (int i = 0; i < arr.length / 2; i++) {
            int tmp = arr[i];
            arr[i] = arr[arr.length - 1 - i];
            arr[arr.length - 1 - i] = tmp;
        }
        return arr;

    }

    public static int[] removeFirst(int[] arr) {
        int[] arr1 = new int[arr.length - 1];
        for (int j = 0; j < arr1.length; j++) {
            arr1[j] = arr[j + 1];

        }

        return arr1;
    }

    public static int[] removeLast(int[] arr) {
        int[] arr1 = new int[arr.length - 1];
        for (int j = 0; j < arr.length - 1; j++) {
            arr1[j] = arr[j];

        }

        return arr1;
    }

    public static int[] squareEach(int[] arr) {
        int[] arr1 = new int[arr.length];
        for (int j = 0; j < arr.length; j++) {
            arr1[j] = arr[j] * arr[j];

        }

        return arr1;
    }
}