Task and Solution : Array of HackerRank

An array is a series of elements of the same type placed in contiguous memory locations that can be individually referenced by adding an index to a unique identifier.

For arrays of a known size,  in this case, use the following declaration:

int arr[10]; //Declares an array named arr of size 10, i.e, you can 
store 10 integers.

Note Unlike C, C++ allows dynamic allocation of arrays at runtime without special calls like malloc(). If , int arr[n] will create an array with space for  integers.

Accessing elements of an array:

Indexing in arrays starts from 0.So the first element is stored at 
arr[0],the second element at arr[1] and so on through arr[9].

You will be given an array of  integers and you have to print the integers in the reverse order.

Input Format

The first line of the input contains ,where  is the number of integers.The next line contains  space-separated integers.

Constraints

, where  is the  integer in the array.

Output Format

Print the  integers of the array in the reverse order, space-separated on a single line.

Sample Input

4
1 4 3 2

Sample Output

2 3 4 1

Solution

#include <cmath>

#include <cstdio>

#include <vector>

#include <iostream>

#include <algorithm>

using namespace std;

int main() {

    /* Enter your code here. Read input from STDIN. Print output to STDOUT */

    int n;

     cin >> n;

     int arr[n];

     for(int i = 0; i < n; ++i) cin >> arr[i];

     for(int i = n - 1; i >= 0; --i) cout << arr[i] <<" ";  

    return 0;

}

 Source : HackerRank