.. _ABC126:

`ABC 126 Editorial <https://atcoder.jp/contests/abc126>`_
===============================================================


.. _ABC126A:

`Problem A: Changing a Character <https://atcoder.jp/contests/abc126/tasks/abc126_a>`_
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

The key here is to print all the characters as they are, and change the one at index `k-1`. This character will be lowercased. We will use C++ `lowercase` function to achieve this. Code is below:

.. code-block:: C++
    :linenos:

    #include<bits/stdc++.h>

    using namespace std;

    int main () {
      
        int n, k;
        string s;
      
        cin >> n >> k >> s;
      
        for (int i=0; i< n; i++) {
          if (i == k-1) putchar( tolower(s[i]) );
          else putchar(s[i]);
        }
        
        return 0;

      
      return 0;
    }