Arrays - DS

An array is a type of data structure that stores elements of the same type in a contiguous block of memory. In an array, , of size , each memory location has some unique index,  (where ), that can be referenced as  (you may also see it written as ).

Given an array, , of  integers, print each element in reverse order as a single line of space-separated integers.

Note: If you've already solved our C++ domain's Arrays Introduction challenge, you may want to skip this.

Input Format

The first line contains an integer,  (the number of integers in ). 
The second line contains  space-separated integers describing .

Constraints

Output Format

Print all  integers in  in reverse order as a single line of space-separated integers.

Sample Input 0

4
1 4 3 2

Sample Output 0

2 3 4 1

풀이

간단한 배열 뒤집기 문제이다.

for문을 이용할 경우 index를 활용하면 쉽게 풀 수 있다.

1. array의 length만큼의 새로운 배열 results를 만든다.

2. for문을 돌려서 

result[0] = a[3]

result[1] = a[2]

result[2] = a[1]

result[3] = a[0]

이 되게끔 index를 조정해준다.

static int[] reverseArray(int[] a) {
    /*
     * Write your code here.
     */
    int[] results = new int[a.length];
    for(int i = 0; i < a.length; i++){
        results[i] = a[a.length - 1 - i];
    }
    return results;
}