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index 8e43c610c..25a0d8de1 100644
--- a/d5/d88/md__d_i_r_e_c_t_o_r_y.html
+++ b/d5/d88/md__d_i_r_e_c_t_o_r_y.html
@@ -229,7 +229,9 @@ Machine Learning</h1>
 <li><a href="https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/machine_learning/adaline_learning.cpp">Adaline Learning</a></li>
 <li><a href="https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/machine_learning/kohonen_som_topology.cpp">Kohonen Som Topology</a></li>
 <li><a href="https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/machine_learning/kohonen_som_trace.cpp">Kohonen Som Trace</a></li>
+<li><a href="https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/machine_learning/neural_network.cpp">Neural Network</a></li>
 <li><a href="https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/machine_learning/ordinary_least_squares_regressor.cpp">Ordinary Least Squares Regressor</a></li>
+<li><a href="https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/machine_learning/vector_ops.hpp">Vector Ops</a></li>
 </ul>
 <h1><a class="anchor" id="autotoc_md28"></a>
 Math</h1>
@@ -306,7 +308,7 @@ Others</h1>
 <li><a href="https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/others/decimal_to_binary.cpp">Decimal To Binary</a></li>
 <li><a href="https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/others/decimal_to_hexadecimal.cpp">Decimal To Hexadecimal</a></li>
 <li><a href="https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/others/decimal_to_roman_numeral.cpp">Decimal To Roman Numeral</a></li>
-<li><a href="https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/others/fast_interger_input.cpp">Fast Interger Input</a></li>
+<li><a href="https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/others/fast_integer_input.cpp">Fast Integer Input</a></li>
 <li><a href="https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/others/happy_number.cpp">Happy Number</a></li>
 <li><a href="https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/others/matrix_exponentiation.cpp">Matrix Exponentiation</a></li>
 <li><a href="https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/others/palindrome_of_number.cpp">Palindrome Of Number</a></li>
diff --git a/d6/dcd/md__c_o_n_t_r_i_b_u_t_i_n_g.html b/d6/dcd/md__c_o_n_t_r_i_b_u_t_i_n_g.html
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@@ -120,7 +120,8 @@ Code</h3>
 <li>Please use the directory structure of the repository.</li>
 <li>File extension for code should be *.h *.cpp.</li>
 <li>Don't use <b>bits/stdc++.h</b> because this is quite Linux specific and slows down the compilation process.</li>
-<li>Avoid using <b>struct</b> and instead use the <b>class</b> keyword.</li>
+<li>Organize your code using **<code>struct</code>**, **<code>class</code>** and/or **<code>namespace</code>** keywords</li>
+<li>If an implementation of the algorithm already exists, please refer to the <a href="../../#new-file-name-guidelines">file-name section below</a>.</li>
 <li>You can suggest reasonable changes to existing algorithms.</li>
 <li>Strictly use snake_case (underscore_separated) in filenames.</li>
 <li>If you have added or modified code, please make sure the code compiles before submitting.</li>
@@ -215,6 +216,7 @@ New File Name guidelines</h3>
 </div><!-- fragment --></li>
 <li>It will be used to dynamically create a directory of files and implementation.</li>
 <li>File name validation will run on docker to ensure the validity.</li>
+<li>If an implementation of the algorithm already exists and your version is different from that implemented, please use incremental numeric digit as a suffix. For example, if <code><a class="el" href="../../d9/d69/median__search_8cpp.html" title="Implementation of Median search algorithm. @cases from here">median_search.cpp</a></code> already exists in the <code>search</code> folder and you are contributing a new implementation, the filename should be <code>median_search2.cpp</code> and for a third implementation, <code>median_search3.cpp</code>.</li>
 </ul>
 <h3><a class="anchor" id="autotoc_md13"></a>
 New Directory guidelines</h3>
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