A left rotation operation on an array of size $n$ shifts each of the array’s elements $1$ unit to the left. Given an integer, $d$, rotate the array that many steps left and return the result.
Example
$d = 2$
$arr = [1, 2, 3, 4, 5]$
After $2$ rotations, $arr’ = [3, 4, 5, 1, 2]$
Function Description
Complete the rotateLeft function in the editor below.
rotateLeft has the following parameters:
Returns
Input Format
The first line contains two space-separated integers that denote $n$, the number of integers, and $d$, the number of left rotations to perform.
The second line contains $n$ space-separated integers that describe $arr[]$.
Constraints
Sample Input
5 4
1 2 3 4 5
Sample Output
5 1 2 3 4
Explanation
To perform $d = 4$ left rotations, the array undergoes the following sequence of changes:
\[[1, 2, 3, 4, 5] \rightarrow [2, 3, 4, 5, 1] \rightarrow [3, 4, 5, 1, 2] \rightarrow [4, 5, 1, 2, 3] \rightarrow [5, 1, 2, 3, 4]\]hackerrank.com/challenges/three-month-preparation-kit-array-left-rotation/