title: Kth minimum in a Range
body: <p>Given an array of integers and some query operations.<br>
  The query operations are of 2 types<br>
  1.Update the value of the ith index to x.<br>
  2.Given 2 integers find the kth minimum in that range.(Ex if the 2 integers are i and j ,we have to find out the kth minimum between i and j both inclusive).<br>
  I can find the Range minimum query using segment tree but could no do so for the kth minimum.
  Can anyone help me?</p>