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diff --git a/‎License‎
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diff --git a/‎README.md‎
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diff --git a/‎data_structures/binary tree/AVLtree.py‎ ‎data_structures/binary tree/AVL_tree.py‎data_structures/binary tree/AVLtree.py renamed to data_structures/binary tree/AVL_tree.py b/‎data_structures/binary tree/AVLtree.py‎ ‎data_structures/binary tree/AVL_tree.py‎data_structures/binary tree/AVLtree.py renamed to data_structures/binary tree/AVL_tree.py
diff --git a/‎data_structures/queue/deqeue.py‎ ‎…a_structures/queue/double_ended_queue.py‎data_structures/queue/deqeue.py renamed to data_structures/queue/double_ended_queue.py b/‎data_structures/queue/deqeue.py‎ ‎…a_structures/queue/double_ended_queue.py‎data_structures/queue/deqeue.py renamed to data_structures/queue/double_ended_queue.py
diff --git a/‎dynamic_programming/FractionalKnapsack.py‎ ‎…namic_programming/Fractional_Knapsack.py‎dynamic_programming/FractionalKnapsack.py renamed to dynamic_programming/Fractional_Knapsack.py b/‎dynamic_programming/FractionalKnapsack.py‎ ‎…namic_programming/Fractional_Knapsack.py‎dynamic_programming/FractionalKnapsack.py renamed to dynamic_programming/Fractional_Knapsack.py
diff --git a/‎dynamic_programming/fastfibonacci.py‎ ‎dynamic_programming/fast_fibonacci.py‎dynamic_programming/fastfibonacci.py renamed to dynamic_programming/fast_fibonacci.py b/‎dynamic_programming/fastfibonacci.py‎ ‎dynamic_programming/fast_fibonacci.py‎dynamic_programming/fastfibonacci.py renamed to dynamic_programming/fast_fibonacci.py
diff --git a/‎…ected and Undirected (Weighted) Graph.py‎ ‎…ected_and_Undirected_(Weighted)_Graph.py‎graphs/Directed and Undirected (Weighted) Graph.py renamed to graphs/Directed_and_Undirected_(Weighted)_Graph.py b/‎…ected and Undirected (Weighted) Graph.py‎ ‎…ected_and_Undirected_(Weighted)_Graph.py‎graphs/Directed and Undirected (Weighted) Graph.py renamed to graphs/Directed_and_Undirected_(Weighted)_Graph.py
diff --git a/‎…path and circuit for undirected graph.py‎ ‎…path_and_circuit_for_undirected_graph.py‎Graphs/Eulerian path and circuit for undirected graph.py renamed to graphs/Eulerian_path_and_circuit_for_undirected_graph.py b/‎…path and circuit for undirected graph.py‎ ‎…path_and_circuit_for_undirected_graph.py‎Graphs/Eulerian path and circuit for undirected graph.py renamed to graphs/Eulerian_path_and_circuit_for_undirected_graph.py
diff --git a/‎graphs/bfs-shortestpath.py‎ ‎graphs/bfs_shortest_path.py‎graphs/bfs-shortestpath.py renamed to graphs/bfs_shortest_path.py b/‎graphs/bfs-shortestpath.py‎ ‎graphs/bfs_shortest_path.py‎graphs/bfs-shortestpath.py renamed to graphs/bfs_shortest_path.py
diff --git a/‎…s/edmonds_karp_Multiple_SourceAndSink.py‎ ‎…edmonds_karp_multiple_source_and_sink.py‎Graphs/edmonds_karp_Multiple_SourceAndSink.py renamed to graphs/edmonds_karp_multiple_source_and_sink.py b/‎…s/edmonds_karp_Multiple_SourceAndSink.py‎ ‎…edmonds_karp_multiple_source_and_sink.py‎Graphs/edmonds_karp_Multiple_SourceAndSink.py renamed to graphs/edmonds_karp_multiple_source_and_sink.py
@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2016 The Algorithms
+Copyright (c) 2019 The Algorithms
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
 
@@ -1,5 +1,6 @@
 # The Algorithms - Python <!-- [![Build Status](https://travis-ci.org/TheAlgorithms/Python.svg)](https://travis-ci.org/TheAlgorithms/Python) -->
-[![Donate](https://img.shields.io/badge/Donate-PayPal-green.svg)](https://www.paypal.me/TheAlgorithms/100)
+[![Donate](https://img.shields.io/badge/Donate-PayPal-green.svg)](https://www.paypal.me/TheAlgorithms/100) &nbsp; 
+[![Gitter chat](https://badges.gitter.im/gitterHQ/gitter.png)](https://gitter.im/TheAlgorithms)
 
 
 ### All algorithms implemented in Python (for education)