# Arrays Introduction in C++ | HackerRank Solution

What’s up coders! Today we are going to solve Arrays Introduction Hacker Rank Problem in C++.

Contents

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, 10 in this case, use the following declaration:

`int arr; //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 n=10, int arr[n] will create an array with space for 10 integers.

Accessing elements of an array:

Indexing in arrays starts from 0.So the first element is stored at

`arr,the second element at arr and so on through arr`.

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

## Input Format

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

## Constraints

• 1 <= N <= 1000
• 1 <= a[i] <= 10000, where a[i] is the ith integer in the array.

## Output Format

Print the N 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–Arrays Introduction in Hackerrank Solution in C++

```#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 a[n] ;
for(int i =  0 ; i<n ;i++)
{
cin >> a[i];
}
for(int i=n-1 ; i>=0 ; i--)
{
cout << a[i] << " ";
}

return 0;
}
```

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