title: Given an array with n elements and an integer k. Divide the array into subarrays, each of them containing k ekements
body: <p>For example:</p>
  
  <p>Input: arr[]={1, 32, 5, 6, 9, 3} and k=2</p>
  
  <p>The subarrays will have elements
  {132}, {56}, {93}.</p>
  
  <p>Now sort these subarrays as {56}, {93}, {132}. Merge these subarrays together and display them as the elements of original array in sorted order as</p>
  
  <p>Final output: arr[]={5, 6, 9, 3, 1, 32}</p>