diff --git a/.github/workflows/README_Updater.yml b/.github/workflows/README_Updater.yml
new file mode 100644
index 000000000..bd19005d1
--- /dev/null
+++ b/.github/workflows/README_Updater.yml
@@ -0,0 +1,25 @@
+
+name: Python package
+
+on:
+ pull_request:
+    branches: [master]
+    types: [closed]
+
+jobs:
+  check-algorithms:
+    if: ${{ github.event.pull_request.merged }} # when doing a PR is merged
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+    - uses: actions/setup-python@v2
+    - name: Update README.md
+      run: | # run scripts/update_functions_list.py
+        python3 scripts/update_functions_list.py 
+    - name: Push README.md
+      run: |
+        git config --global user.email "kwk236@gmail.com"
+        git config --global user.name "Keon"
+        git commit -am "update README.md" || true
+        git push
diff --git a/README.md b/README.md
index 105c82505..cc190cc8c 100644
--- a/README.md
+++ b/README.md
@@ -51,369 +51,388 @@ If you want to uninstall algorithms, it is as simple as:
     $ pip3 uninstall -y algorithms
 
 ## List of Implementations
-
-- [arrays](algorithms/arrays)
-    - [delete_nth](algorithms/arrays/delete_nth.py)
-    - [flatten](algorithms/arrays/flatten.py)
-    - [garage](algorithms/arrays/garage.py)
-    - [josephus_problem](algorithms/arrays/josephus.py)
-    - [limit](algorithms/arrays/limit.py)
-    - [longest_non_repeat](algorithms/arrays/longest_non_repeat.py/)
-    - [max_ones_index](algorithms/arrays/max_ones_index.py)
-    - [merge_intervals](algorithms/arrays/merge_intervals.py)
-    - [missing_ranges](algorithms/arrays/missing_ranges.py)
-    - [plus_one](algorithms/arrays/plus_one.py)
-    - [rotate](algorithms/arrays/rotate.py)
-    - [summarize_ranges](algorithms/arrays/summarize_ranges.py)
-    - [three_sum](algorithms/arrays/three_sum.py)
-    - [trimmean](algorithms/arrays/trimmean.py)
-    - [top_1](algorithms/arrays/top_1.py)
-    - [two_sum](algorithms/arrays/two_sum.py)
-    - [move_zeros](algorithms/arrays/move_zeros.py)
-    - [n_sum](algorithms/arrays/n_sum.py)
-- [automata](algorithms/automata)
-    - [DFA](algorithms/automata/dfa.py)
-- [backtrack](algorithms/backtrack)
-    - [general_solution.md](algorithms/backtrack/)
-    - [add_operators](algorithms/backtrack/add_operators.py)
-    - [anagram](algorithms/backtrack/anagram.py)
-    - [array_sum_combinations](algorithms/backtrack/array_sum_combinations.py)
-    - [combination_sum](algorithms/backtrack/combination_sum.py)
-    - [factor_combinations](algorithms/backtrack/factor_combinations.py)
-    - [generate_abbreviations](algorithms/backtrack/generate_abbreviations.py)
-    - [generate_parenthesis](algorithms/backtrack/generate_parenthesis.py)
-    - [letter_combination](algorithms/backtrack/letter_combination.py)
-    - [palindrome_partitioning](algorithms/backtrack/palindrome_partitioning.py)
-    - [pattern_match](algorithms/backtrack/pattern_match.py)
-    - [permute](algorithms/backtrack/permute.py)
-    - [permute_unique](algorithms/backtrack/permute_unique.py)
-    - [subsets](algorithms/backtrack/subsets.py)
-    - [subsets_unique](algorithms/backtrack/subsets_unique.py)
-- [bfs](algorithms/bfs)
-    - [maze_search](algorithms/bfs/maze_search.py)
-    - [shortest_distance_from_all_buildings](algorithms/bfs/shortest_distance_from_all_buildings.py)
-    - [word_ladder](algorithms/bfs/word_ladder.py)
-- [bit](algorithms/bit)
-    - [add_bitwise_operator](algorithms/bit/add_bitwise_operator.py)
-    - [bit_operation](algorithms/bit/bit_operation.py)
-    - [bytes_int_conversion](algorithms/bit/bytes_int_conversion.py)
-    - [count_flips_to_convert](algorithms/bit/count_flips_to_convert.py)
-    - [count_ones](algorithms/bit/count_ones.py)
-    - [find_difference](algorithms/bit/find_difference.py)
-    - [find_missing_number](algorithms/bit/find_missing_number.py)
-    - [flip_bit_longest_sequence](algorithms/bit/flip_bit_longest_sequence.py)
-    - [power_of_two](algorithms/bit/power_of_two.py)
-    - [reverse_bits](algorithms/bit/reverse_bits.py)
-    - [single_number](algorithms/bit/single_number.py)
-    - [single_number2](algorithms/bit/single_number2.py)
-    - [single_number3](algorithms/bit/single_number3.py)
-    - [subsets](algorithms/bit/subsets.py)
-    - [swap_pair](algorithms/bit/swap_pair.py)
-    - [has_alternative_bit](algorithms/bit/has_alternative_bit.py)
-    - [insert_bit](algorithms/bit/insert_bit.py)
-    - [remove_bit](algorithms/bit/remove_bit.py)
-    - [binary_gap](algorithms/bit/binary_gap.py)
-- [compression](algorithms/compression)
-    - [huffman_coding](algorithms/compression/huffman_coding.py)
-    - [rle_compression](algorithms/compression/rle_compression.py)
-    - [elias](algorithms/compression/elias.py)
-- [dfs](algorithms/dfs)
-    - [all_factors](algorithms/dfs/all_factors.py)
-    - [count_islands](algorithms/dfs/count_islands.py)
-    - [pacific_atlantic](algorithms/dfs/pacific_atlantic.py)
-    - [sudoku_solver](algorithms/dfs/sudoku_solver.py)
-    - [walls_and_gates](algorithms/dfs/walls_and_gates.py)
-- [distribution](algorithms/distribution)
-    - [histogram](algorithms/distribution/histogram.py)
-- [dp](algorithms/dp)
-    - [buy_sell_stock](algorithms/dp/buy_sell_stock.py)
-    - [climbing_stairs](algorithms/dp/climbing_stairs.py)
-    - [coin_change](algorithms/dp/coin_change.py)
-    - [combination_sum](algorithms/dp/combination_sum.py)
-    - [egg_drop](algorithms/dp/egg_drop.py)
-    - [house_robber](algorithms/dp/house_robber.py)
-    - [int_divide](algorithms/dp/int_divide.py)
-    - [job_scheduling](algorithms/dp/job_scheduling.py)
-    - [knapsack](algorithms/dp/knapsack.py)
-    - [longest_increasing](algorithms/dp/longest_increasing.py)
-    - [matrix_chain_order](algorithms/dp/matrix_chain_order.py)
-    - [max_product_subarray](algorithms/dp/max_product_subarray.py)
-    - [max_subarray](algorithms/dp/max_subarray.py)
-    - [min_cost_path](algorithms/dp/min_cost_path.py)
-    - [num_decodings](algorithms/dp/num_decodings.py)
-    - [regex_matching](algorithms/dp/regex_matching.py)
-    - [rod_cut](algorithms/dp/rod_cut.py)
-    - [word_break](algorithms/dp/word_break.py)
-    - [fibonacci](algorithms/dp/fib.py)
-	- [hosoya triangle](algorithms/dp/hosoya_triangle.py)
-	- [K-Factor_strings](algorithms/dp/k_factor.py)
-    - [planting_trees](algorithms/dp/planting_trees.py)
-- [graph](algorithms/graph)
-    - [check_bipartite](algorithms/graph/check_bipartite.py)
-    - [strongly_connected](algorithms/graph/check_digraph_strongly_connected.py)
-    - [clone_graph](algorithms/graph/clone_graph.py)
-    - [cycle_detection](algorithms/graph/cycle_detection.py)
-    - [find_all_cliques](algorithms/graph/find_all_cliques.py)
-    - [find_path](algorithms/graph/find_path.py)
-    - [graph](algorithms/graph/graph.py)
-    - [dijkstra](algorithms/graph/dijkstra.py)
-    - [markov_chain](algorithms/graph/markov_chain.py)
-    - [minimum_spanning_tree](algorithms/graph/minimum_spanning_tree.py)
-    - [satisfiability](algorithms/graph/satisfiability.py)
-    - [minimum_spanning_tree_prims](algorithms/graph/prims_minimum_spanning.py)
-    - [tarjan](algorithms/graph/tarjan.py)
-    - [traversal](algorithms/graph/traversal.py)
-	  - [maximum_flow](algorithms/graph/maximum_flow.py)
-    - [maximum_flow_bfs](algorithms/graph/maximum_flow_bfs.py)
-    - [maximum_flow_dfs](algorithms/graph/maximum_flow_dfs.py)
-    - [all_pairs_shortest_path](algorithms/graph/all_pairs_shortest_path.py)
-    - [bellman_ford](algorithms/graph/bellman_ford.py)
-    - [Count Connected Components](algorithms/graph/count_connected_number_of_component.py)
-- [heap](algorithms/heap)
-    - [merge_sorted_k_lists](algorithms/heap/merge_sorted_k_lists.py)
-    - [skyline](algorithms/heap/skyline.py)
-    - [sliding_window_max](algorithms/heap/sliding_window_max.py)
-    - [binary_heap](algorithms/heap/binary_heap.py)
-    - [k_closest_points](algorithms/heap/k_closest_points.py)
-- [linkedlist](algorithms/linkedlist)
-    - [add_two_numbers](algorithms/linkedlist/add_two_numbers.py)
-    - [copy_random_pointer](algorithms/linkedlist/copy_random_pointer.py)
-    - [delete_node](algorithms/linkedlist/delete_node.py)
-    - [first_cyclic_node](algorithms/linkedlist/first_cyclic_node.py)
-    - [is_cyclic](algorithms/linkedlist/is_cyclic.py)
-    - [is_palindrome](algorithms/linkedlist/is_palindrome.py)
-    - [kth_to_last](algorithms/linkedlist/kth_to_last.py)
-    - [linkedlist](algorithms/linkedlist/linkedlist.py)
-    - [remove_duplicates](algorithms/linkedlist/remove_duplicates.py)
-    - [reverse](algorithms/linkedlist/reverse.py)
-    - [rotate_list](algorithms/linkedlist/rotate_list.py)
-    - [swap_in_pairs](algorithms/linkedlist/swap_in_pairs.py)
-    - [is_sorted](algorithms/linkedlist/is_sorted.py)
-    - [remove_range](algorithms/linkedlist/remove_range.py)
-- [map](algorithms/map)
-    - [hashtable](algorithms/map/hashtable.py)
-    - [separate_chaining_hashtable](algorithms/map/separate_chaining_hashtable.py)
-    - [longest_common_subsequence](algorithms/map/longest_common_subsequence.py)
-    - [longest_palindromic_subsequence](algorithms/map/longest_palindromic_subsequence.py)
-    - [randomized_set](algorithms/map/randomized_set.py)
-    - [valid_sudoku](algorithms/map/valid_sudoku.py)
-    - [word_pattern](algorithms/map/word_pattern.py)
-    - [is_isomorphic](algorithms/map/is_isomorphic.py)
-    - [is_anagram](algorithms/map/is_anagram.py)
-- [maths](algorithms/maths)
-    - [base_conversion](algorithms/maths/base_conversion.py)
-    - [chinese_remainder_theorem](algorithms/maths/chinese_remainder_theorem.py)
-    - [combination](algorithms/maths/combination.py)
-    - [cosine_similarity](algorithms/maths/cosine_similarity.py)
-    - [decimal_to_binary_ip](algorithms/maths/decimal_to_binary_ip.py)
-    - [diffie_hellman_key_exchange](algorithms/maths/diffie_hellman_key_exchange.py)
-    - [euler_totient](algorithms/maths/euler_totient.py)
-    - [extended_gcd](algorithms/maths/extended_gcd.py)
-    - [factorial](algorithms/maths/factorial.py)
-    - [find_order](algorithms/maths/find_order_simple.py)
-    - [find_primitive_root](algorithms/maths/find_primitive_root_simple.py)
-    - [gcd/lcm](algorithms/maths/gcd.py)
-    - [generate_strobogrammtic](algorithms/maths/generate_strobogrammtic.py)
-    - [hailstone](algorithms/maths/hailstone.py)
-    - [is_strobogrammatic](algorithms/maths/is_strobogrammatic.py)
-    - [krishnamurthy_number](algorithms/maths/krishnamurthy_number.py)
-    - [magic_number](algorithms/maths/magic_number.py)
-    - [modular_exponential](algorithms/maths/modular_exponential.py)
-    - [modular_inverse](algorithms/maths/modular_inverse.py)
-    - [next_bigger](algorithms/maths/next_bigger.py)
-    - [next_perfect_square](algorithms/maths/next_perfect_square.py)
-    - [nth_digit](algorithms/maths/nth_digit.py)
-    - [polynomial](algorithms/maths/polynomial.py)
-    - [power](algorithms/maths/power.py)
-    - [prime_check](algorithms/maths/prime_check.py)
-    - [primes_sieve_of_eratosthenes](algorithms/maths/primes_sieve_of_eratosthenes.py)
-    - [pythagoras](algorithms/maths/pythagoras.py)
-    - [rabin_miller](algorithms/maths/rabin_miller.py)
-    - [recursive_binomial_coefficient](algorithms/maths/recursive_binomial_coefficient.py)
-    - [rsa](algorithms/maths/rsa.py)
-    - [sqrt_precision_factor](algorithms/maths/sqrt_precision_factor.py)
-    - [summing_digits](algorithms/maths/summing_digits.py)
-    - [symmetry_group_cycle_index](algorithms/maths/symmetry_group_cycle_index.py)
-- [matrix](algorithms/matrix)
-    - [sudoku_validator](algorithms/matrix/sudoku_validator.py)
-    - [bomb_enemy](algorithms/matrix/bomb_enemy.py)
-    - [copy_transform](algorithms/matrix/copy_transform.py)
-    - [count_paths](algorithms/matrix/count_paths.py)
-    - [matrix_exponentiation](algorithms/matrix/matrix_exponentiation.py)
-    - [matrix_inversion](algorithms/matrix/matrix_inversion.py)
-    - [matrix_multiplication](algorithms/matrix/multiply.py)
-    - [rotate_image](algorithms/matrix/rotate_image.py)
-    - [search_in_sorted_matrix](algorithms/matrix/search_in_sorted_matrix.py)
-    - [sparse_dot_vector](algorithms/matrix/sparse_dot_vector.py)
-    - [sparse_mul](algorithms/matrix/sparse_mul.py)
-    - [spiral_traversal](algorithms/matrix/spiral_traversal.py)
-	- [crout_matrix_decomposition](algorithms/matrix/crout_matrix_decomposition.py)
-	- [cholesky_matrix_decomposition](algorithms/matrix/cholesky_matrix_decomposition.py)
-    - [sum_sub_squares](algorithms/matrix/sum_sub_squares.py)
-    - [sort_matrix_diagonally](algorithms/matrix/sort_matrix_diagonally.py)
-- [queues](algorithms/queues)
-    - [max_sliding_window](algorithms/queues/max_sliding_window.py)
-    - [moving_average](algorithms/queues/moving_average.py)
-    - [queue](algorithms/queues/queue.py)
-    - [reconstruct_queue](algorithms/queues/reconstruct_queue.py)
-    - [zigzagiterator](algorithms/queues/zigzagiterator.py)
-- [search](algorithms/search)
-    - [binary_search](algorithms/search/binary_search.py)
-    - [first_occurrence](algorithms/search/first_occurrence.py)
-    - [last_occurrence](algorithms/search/last_occurrence.py)
-    - [linear_search](algorithms/search/linear_search.py)
-    - [search_insert](algorithms/search/search_insert.py)
-    - [two_sum](algorithms/search/two_sum.py)
-    - [search_range](algorithms/search/search_range.py)
-    - [find_min_rotate](algorithms/search/find_min_rotate.py)
-    - [search_rotate](algorithms/search/search_rotate.py)
-    - [jump_search](algorithms/search/jump_search.py)
-    - [next_greatest_letter](algorithms/search/next_greatest_letter.py)
-    - [interpolation_search](algorithms/search/interpolation_search.py)
-- [set](algorithms/set)
-    - [randomized_set](algorithms/set/randomized_set.py)
-    - [set_covering](algorithms/set/set_covering.py)
-    - [find_keyboard_row](algorithms/set/find_keyboard_row.py)
-- [sort](algorithms/sort)
-    - [bitonic_sort](algorithms/sort/bitonic_sort.py)
-    - [bogo_sort](algorithms/sort/bogo_sort.py)
-    - [bubble_sort](algorithms/sort/bubble_sort.py)
-    - [bucket_sort](algorithms/sort/bucket_sort.py)
-    - [cocktail_shaker_sort](algorithms/sort/cocktail_shaker_sort.py)
-    - [comb_sort](algorithms/sort/comb_sort.py)
-    - [counting_sort](algorithms/sort/counting_sort.py)
-    - [cycle_sort](algorithms/sort/cycle_sort.py)
-    - [gnome_sort](algorithms/sort/gnome_sort.py)
-    - [heap_sort](algorithms/sort/heap_sort.py)
-    - [insertion_sort](algorithms/sort/insertion_sort.py)
-    - [meeting_rooms](algorithms/sort/meeting_rooms.py)
-    - [merge_sort](algorithms/sort/merge_sort.py)
-    - [pancake_sort](algorithms/sort/pancake_sort.py)
-    - [pigeonhole_sort](algorithms/sort/pigeonhole_sort.py)
-    - [quick_sort](algorithms/sort/quick_sort.py)
-    - [radix_sort](algorithms/sort/radix_sort.py)
-    - [selection_sort](algorithms/sort/selection_sort.py)
-    - [shell_sort](algorithms/sort/shell_sort.py)
-    - [sort_colors](algorithms/sort/sort_colors.py)
-    - [stooge_sort](algorithms/sort/stooge_sort.py)
-    - [top_sort](algorithms/sort/top_sort.py)
-    - [wiggle_sort](algorithms/sort/wiggle_sort.py)
-- [stack](algorithms/stack)
-    - [longest_abs_path](algorithms/stack/longest_abs_path.py)
-    - [simplify_path](algorithms/stack/simplify_path.py)
-    - [stack](algorithms/stack/stack.py)
-    - [valid_parenthesis](algorithms/stack/valid_parenthesis.py)
-    - [stutter](algorithms/stack/stutter.py)
-    - [switch_pairs](algorithms/stack/switch_pairs.py)
-    - [is_consecutive](algorithms/stack/is_consecutive.py)
-    - [remove_min](algorithms/stack/remove_min.py)
-    - [is_sorted](algorithms/stack/is_sorted.py)
-- [streaming](algorithms/streaming)
-    - [1-sparse-recovery](algorithms/streaming/one_sparse_recovery.py)
-    - [misra-gries](algorithms/streaming/misra_gries.py)
-- [strings](algorithms/strings)
-    - [fizzbuzz](algorithms/strings/fizzbuzz.py)
-    - [delete_reoccurring](algorithms/strings/delete_reoccurring.py)
-    - [strip_url_params](algorithms/strings/strip_url_params.py)
-    - [validate_coordinates](algorithms/strings/validate_coordinates.py)
-    - [domain_extractor](algorithms/strings/domain_extractor.py)
-    - [merge_string_checker](algorithms/strings/merge_string_checker.py)
-    - [add_binary](algorithms/strings/add_binary.py)
-    - [breaking_bad](algorithms/strings/breaking_bad.py)
-    - [decode_string](algorithms/strings/decode_string.py)
-    - [encode_decode](algorithms/strings/encode_decode.py)
-    - [group_anagrams](algorithms/strings/group_anagrams.py)
-    - [int_to_roman](algorithms/strings/int_to_roman.py)
-    - [is_palindrome](algorithms/strings/is_palindrome.py)
-    - [license_number](algorithms/strings/license_number.py)
-    - [make_sentence](algorithms/strings/make_sentence.py)
-    - [multiply_strings](algorithms/strings/multiply_strings.py)
-    - [one_edit_distance](algorithms/strings/one_edit_distance.py)
-    - [rabin_karp](algorithms/strings/rabin_karp.py)
-    - [reverse_string](algorithms/strings/reverse_string.py)
-    - [reverse_vowel](algorithms/strings/reverse_vowel.py)
-    - [reverse_words](algorithms/strings/reverse_words.py)
-    - [roman_to_int](algorithms/strings/roman_to_int.py)
-    - [word_squares](algorithms/strings/word_squares.py)
-    - [unique_morse](algorithms/strings/unique_morse.py)
-    - [judge_circle](algorithms/strings/judge_circle.py)
-    - [strong_password](algorithms/strings/strong_password.py)
-    - [caesar_cipher](algorithms/strings/caesar_cipher.py)
-    - [check_pangram](algorithms/strings/check_pangram.py)
-    - [contain_string](algorithms/strings/contain_string.py)
-    - [count_binary_substring](algorithms/strings/count_binary_substring.py)
-    - [repeat_string](algorithms/strings/repeat_string.py)
-    - [min_distance](algorithms/strings/min_distance.py)
-    - [longest_common_prefix](algorithms/strings/longest_common_prefix.py)
-    - [rotate](algorithms/strings/rotate.py)
-    - [first_unique_char](algorithms/strings/first_unique_char.py)
-    - [repeat_substring](algorithms/strings/repeat_substring.py)
-	  - [atbash_cipher](algorithms/strings/atbash_cipher.py)
-    - [longest_palindromic_substring](algorithms/strings/longest_palindromic_substring.py)
-  	- [knuth_morris_pratt](algorithms/strings/knuth_morris_pratt.py)
-    - [panagram](algorithms/strings/panagram.py)
-- [tree](algorithms/tree)
-    - [bst](algorithms/tree/bst)
-        - [array_to_bst](algorithms/tree/bst/array_to_bst.py)
-        - [bst_closest_value](algorithms/tree/bst/bst_closest_value.py)
-        - [BSTIterator](algorithms/tree/bst/BSTIterator.py)
-        - [delete_node](algorithms/tree/bst/delete_node.py)
-        - [is_bst](algorithms/tree/bst/is_bst.py)
-        - [kth_smallest](algorithms/tree/bst/kth_smallest.py)
-        - [lowest_common_ancestor](algorithms/tree/bst/lowest_common_ancestor.py)
-        - [predecessor](algorithms/tree/bst/predecessor.py)
-        - [serialize_deserialize](algorithms/tree/bst/serialize_deserialize.py)
-        - [successor](algorithms/tree/bst/successor.py)
-        - [unique_bst](algorithms/tree/bst/unique_bst.py)
-        - [depth_sum](algorithms/tree/bst/depth_sum.py)
-        - [count_left_node](algorithms/tree/bst/count_left_node.py)
-        - [num_empty](algorithms/tree/bst/num_empty.py)
-        - [height](algorithms/tree/bst/height.py)
-    - [fenwick_tree](algorithms/tree/fenwick_tree]
-	- [fenwick_tree](algorithms/tree/fenwick_tree/fenwick_tree.py)
-    - [red_black_tree](algorithms/tree/red_black_tree)
-        - [red_black_tree](algorithms/tree/red_black_tree/red_black_tree.py)
-    - [segment_tree](algorithms/tree/segment_tree)
-        - [segment_tree](algorithms/tree/segment_tree/segment_tree.py)
-        - [iterative_segment_tree](algorithms/tree/segment_tree/iterative_segment_tree.py)
-    - [traversal](algorithms/tree/traversal)
-        - [inorder](algorithms/tree/traversal/inorder.py)
-        - [level_order](algorithms/tree/traversal/level_order.py)
-        - [postorder](algorithms/tree/traversal/postorder.py)
-        - [preorder](algorithms/tree/traversal/preorder.py)
-        - [zigzag](algorithms/tree/traversal/zigzag.py)
-    - [trie](algorithms/tree/trie)
-        - [add_and_search](algorithms/tree/trie/add_and_search.py)
-        - [trie](algorithms/tree/trie/trie.py)
-    - [b_tree](algorithms/tree/b_tree.py)
-    - [binary_tree_paths](algorithms/tree/binary_tree_paths.py)
-    - [bin_tree_to_list](algorithms/tree/bin_tree_to_list.py)
-    - [construct_tree_preorder_postorder](algorithms/tree/construct_tree_postorder_preorder.py)
-    - [deepest_left](algorithms/tree/deepest_left.py)
-    - [invert_tree](algorithms/tree/invert_tree.py)
-    - [is_balanced](algorithms/tree/is_balanced.py)
-    - [is_subtree](algorithms/tree/is_subtree.py)
-    - [is_symmetric](algorithms/tree/is_symmetric.py)
-    - [longest_consecutive](algorithms/tree/longest_consecutive.py)
-    - [lowest_common_ancestor](algorithms/tree/lowest_common_ancestor.py)
-    - [max_height](algorithms/tree/max_height.py)
-    - [max_path_sum](algorithms/tree/max_path_sum.py)
-    - [min_height](algorithms/tree/min_height.py)
-    - [path_sum](algorithms/tree/path_sum.py)
-    - [path_sum2](algorithms/tree/path_sum2.py)
-    - [pretty_print](algorithms/tree/pretty_print.py)
-    - [same_tree](algorithms/tree/same_tree.py)
-    - [tree](algorithms/tree/tree.py)
-- [unix](algorithms/unix)
-    - [path](algorithms/unix/path/)
-        - [join_with_slash](algorithms/unix/path/join_with_slash.py)
-        - [full_path](algorithms/unix/path/full_path.py)
-        - [split](algorithms/unix/path/split.py)
-        - [simplify_path](algorithms/unix/path/simplify_path.py)
-- [unionfind](algorithms/unionfind)
-    - [count_islands](algorithms/unionfind/count_islands.py)
-
-
+<!--fnc_list-->
+  * [arrays](./algorithms/arrays)
+    * [delete_nth.py](./algorithms/arrays/delete_nth.py)
+    * [flatten.py](./algorithms/arrays/flatten.py)
+    * [garage.py](./algorithms/arrays/garage.py)
+    * [josephus.py](./algorithms/arrays/josephus.py)
+    * [limit.py](./algorithms/arrays/limit.py)
+    * [longest_non_repeat.py](./algorithms/arrays/longest_non_repeat.py)
+    * [max_ones_index.py](./algorithms/arrays/max_ones_index.py)
+    * [merge_intervals.py](./algorithms/arrays/merge_intervals.py)
+    * [missing_ranges.py](./algorithms/arrays/missing_ranges.py)
+    * [move_zeros.py](./algorithms/arrays/move_zeros.py)
+    * [n_sum.py](./algorithms/arrays/n_sum.py)
+    * [plus_one.py](./algorithms/arrays/plus_one.py)
+    * [rotate.py](./algorithms/arrays/rotate.py)
+    * [summarize_ranges.py](./algorithms/arrays/summarize_ranges.py)
+    * [three_sum.py](./algorithms/arrays/three_sum.py)
+    * [top_1.py](./algorithms/arrays/top_1.py)
+    * [trimmean.py](./algorithms/arrays/trimmean.py)
+    * [two_sum.py](./algorithms/arrays/two_sum.py)
+  * [automata](./algorithms/automata)
+    * [dfa.py](./algorithms/automata/dfa.py)
+  * [backtrack](./algorithms/backtrack)
+    * [add_operators.py](./algorithms/backtrack/add_operators.py)
+    * [anagram.py](./algorithms/backtrack/anagram.py)
+    * [array_sum_combinations.py](./algorithms/backtrack/array_sum_combinations.py)
+    * [combination_sum.py](./algorithms/backtrack/combination_sum.py)
+    * [factor_combinations.py](./algorithms/backtrack/factor_combinations.py)
+    * [find_words.py](./algorithms/backtrack/find_words.py)
+    * [generate_abbreviations.py](./algorithms/backtrack/generate_abbreviations.py)
+    * [generate_parenthesis.py](./algorithms/backtrack/generate_parenthesis.py)
+    * [letter_combination.py](./algorithms/backtrack/letter_combination.py)
+    * [palindrome_partitioning.py](./algorithms/backtrack/palindrome_partitioning.py)
+    * [pattern_match.py](./algorithms/backtrack/pattern_match.py)
+    * [permute.py](./algorithms/backtrack/permute.py)
+    * [permute_unique.py](./algorithms/backtrack/permute_unique.py)
+    * [subsets.py](./algorithms/backtrack/subsets.py)
+    * [subsets_unique.py](./algorithms/backtrack/subsets_unique.py)
+  * [bfs](./algorithms/bfs)
+    * [count_islands.py](./algorithms/bfs/count_islands.py)
+    * [maze_search.py](./algorithms/bfs/maze_search.py)
+    * [shortest_distance_from_all_buildings.py](./algorithms/bfs/shortest_distance_from_all_buildings.py)
+    * [word_ladder.py](./algorithms/bfs/word_ladder.py)
+  * [bit](./algorithms/bit)
+    * [add_bitwise_operator.py](./algorithms/bit/add_bitwise_operator.py)
+    * [binary_gap.py](./algorithms/bit/binary_gap.py)
+    * [bit_operation.py](./algorithms/bit/bit_operation.py)
+    * [bytes_int_conversion.py](./algorithms/bit/bytes_int_conversion.py)
+    * [count_flips_to_convert.py](./algorithms/bit/count_flips_to_convert.py)
+    * [count_ones.py](./algorithms/bit/count_ones.py)
+    * [find_difference.py](./algorithms/bit/find_difference.py)
+    * [find_missing_number.py](./algorithms/bit/find_missing_number.py)
+    * [flip_bit_longest_sequence.py](./algorithms/bit/flip_bit_longest_sequence.py)
+    * [has_alternative_bit.py](./algorithms/bit/has_alternative_bit.py)
+    * [insert_bit.py](./algorithms/bit/insert_bit.py)
+    * [power_of_two.py](./algorithms/bit/power_of_two.py)
+    * [remove_bit.py](./algorithms/bit/remove_bit.py)
+    * [reverse_bits.py](./algorithms/bit/reverse_bits.py)
+    * [single_number.py](./algorithms/bit/single_number.py)
+    * [single_number2.py](./algorithms/bit/single_number2.py)
+    * [single_number3.py](./algorithms/bit/single_number3.py)
+    * [subsets.py](./algorithms/bit/subsets.py)
+    * [swap_pair.py](./algorithms/bit/swap_pair.py)
+  * [compression](./algorithms/compression)
+    * [elias.py](./algorithms/compression/elias.py)
+    * [huffman_coding.py](./algorithms/compression/huffman_coding.py)
+    * [rle_compression.py](./algorithms/compression/rle_compression.py)
+  * [dfs](./algorithms/dfs)
+    * [all_factors.py](./algorithms/dfs/all_factors.py)
+    * [count_islands.py](./algorithms/dfs/count_islands.py)
+    * [maze_search.py](./algorithms/dfs/maze_search.py)
+    * [pacific_atlantic.py](./algorithms/dfs/pacific_atlantic.py)
+    * [sudoku_solver.py](./algorithms/dfs/sudoku_solver.py)
+    * [walls_and_gates.py](./algorithms/dfs/walls_and_gates.py)
+  * [distribution](./algorithms/distribution)
+    * [histogram.py](./algorithms/distribution/histogram.py)
+  * [dp](./algorithms/dp)
+    * [buy_sell_stock.py](./algorithms/dp/buy_sell_stock.py)
+    * [climbing_stairs.py](./algorithms/dp/climbing_stairs.py)
+    * [coin_change.py](./algorithms/dp/coin_change.py)
+    * [combination_sum.py](./algorithms/dp/combination_sum.py)
+    * [edit_distance.py](./algorithms/dp/edit_distance.py)
+    * [egg_drop.py](./algorithms/dp/egg_drop.py)
+    * [fib.py](./algorithms/dp/fib.py)
+    * [hosoya_triangle.py](./algorithms/dp/hosoya_triangle.py)
+    * [house_robber.py](./algorithms/dp/house_robber.py)
+    * [int_divide.py](./algorithms/dp/int_divide.py)
+    * [job_scheduling.py](./algorithms/dp/job_scheduling.py)
+    * [k_factor.py](./algorithms/dp/k_factor.py)
+    * [knapsack.py](./algorithms/dp/knapsack.py)
+    * [longest_common_subsequence.py](./algorithms/dp/longest_common_subsequence.py)
+    * [longest_increasing.py](./algorithms/dp/longest_increasing.py)
+    * [matrix_chain_order.py](./algorithms/dp/matrix_chain_order.py)
+    * [max_product_subarray.py](./algorithms/dp/max_product_subarray.py)
+    * [max_subarray.py](./algorithms/dp/max_subarray.py)
+    * [min_cost_path.py](./algorithms/dp/min_cost_path.py)
+    * [num_decodings.py](./algorithms/dp/num_decodings.py)
+    * [planting_trees.py](./algorithms/dp/planting_trees.py)
+    * [regex_matching.py](./algorithms/dp/regex_matching.py)
+    * [rod_cut.py](./algorithms/dp/rod_cut.py)
+    * [word_break.py](./algorithms/dp/word_break.py)
+  * [graph](./algorithms/graph)
+    * [all_pairs_shortest_path.py](./algorithms/graph/all_pairs_shortest_path.py)
+    * [bellman_ford.py](./algorithms/graph/bellman_ford.py)
+    * [check_bipartite.py](./algorithms/graph/check_bipartite.py)
+    * [check_digraph_strongly_connected.py](./algorithms/graph/check_digraph_strongly_connected.py)
+    * [clone_graph.py](./algorithms/graph/clone_graph.py)
+    * [count_connected_number_of_component.py](./algorithms/graph/count_connected_number_of_component.py)
+    * [cycle_detection.py](./algorithms/graph/cycle_detection.py)
+    * [dijkstra.py](./algorithms/graph/dijkstra.py)
+    * [find_all_cliques.py](./algorithms/graph/find_all_cliques.py)
+    * [find_path.py](./algorithms/graph/find_path.py)
+    * [graph.py](./algorithms/graph/graph.py)
+    * [markov_chain.py](./algorithms/graph/markov_chain.py)
+    * [maximum_flow.py](./algorithms/graph/maximum_flow.py)
+    * [maximum_flow_bfs.py](./algorithms/graph/maximum_flow_bfs.py)
+    * [maximum_flow_dfs.py](./algorithms/graph/maximum_flow_dfs.py)
+    * [minimum_spanning_tree.py](./algorithms/graph/minimum_spanning_tree.py)
+    * [path_between_two_vertices_in_digraph.py](./algorithms/graph/path_between_two_vertices_in_digraph.py)
+    * [prims_minimum_spanning.py](./algorithms/graph/prims_minimum_spanning.py)
+    * [satisfiability.py](./algorithms/graph/satisfiability.py)
+    * [tarjan.py](./algorithms/graph/tarjan.py)
+    * [transitive_closure_dfs.py](./algorithms/graph/transitive_closure_dfs.py)
+    * [traversal.py](./algorithms/graph/traversal.py)
+  * [heap](./algorithms/heap)
+    * [binary_heap.py](./algorithms/heap/binary_heap.py)
+    * [k_closest_points.py](./algorithms/heap/k_closest_points.py)
+    * [merge_sorted_k_lists.py](./algorithms/heap/merge_sorted_k_lists.py)
+    * [skyline.py](./algorithms/heap/skyline.py)
+    * [sliding_window_max.py](./algorithms/heap/sliding_window_max.py)
+  * [linkedlist](./algorithms/linkedlist)
+    * [add_two_numbers.py](./algorithms/linkedlist/add_two_numbers.py)
+    * [copy_random_pointer.py](./algorithms/linkedlist/copy_random_pointer.py)
+    * [delete_node.py](./algorithms/linkedlist/delete_node.py)
+    * [first_cyclic_node.py](./algorithms/linkedlist/first_cyclic_node.py)
+    * [intersection.py](./algorithms/linkedlist/intersection.py)
+    * [is_cyclic.py](./algorithms/linkedlist/is_cyclic.py)
+    * [is_palindrome.py](./algorithms/linkedlist/is_palindrome.py)
+    * [is_sorted.py](./algorithms/linkedlist/is_sorted.py)
+    * [kth_to_last.py](./algorithms/linkedlist/kth_to_last.py)
+    * [linkedlist.py](./algorithms/linkedlist/linkedlist.py)
+    * [merge_two_list.py](./algorithms/linkedlist/merge_two_list.py)
+    * [partition.py](./algorithms/linkedlist/partition.py)
+    * [remove_duplicates.py](./algorithms/linkedlist/remove_duplicates.py)
+    * [remove_range.py](./algorithms/linkedlist/remove_range.py)
+    * [reverse.py](./algorithms/linkedlist/reverse.py)
+    * [rotate_list.py](./algorithms/linkedlist/rotate_list.py)
+    * [swap_in_pairs.py](./algorithms/linkedlist/swap_in_pairs.py)
+  * [map](./algorithms/map)
+    * [hashtable.py](./algorithms/map/hashtable.py)
+    * [is_anagram.py](./algorithms/map/is_anagram.py)
+    * [is_isomorphic.py](./algorithms/map/is_isomorphic.py)
+    * [longest_common_subsequence.py](./algorithms/map/longest_common_subsequence.py)
+    * [longest_palindromic_subsequence.py](./algorithms/map/longest_palindromic_subsequence.py)
+    * [randomized_set.py](./algorithms/map/randomized_set.py)
+    * [separate_chaining_hashtable.py](./algorithms/map/separate_chaining_hashtable.py)
+    * [valid_sudoku.py](./algorithms/map/valid_sudoku.py)
+    * [word_pattern.py](./algorithms/map/word_pattern.py)
+  * [maths](./algorithms/maths)
+    * [base_conversion.py](./algorithms/maths/base_conversion.py)
+    * [chinese_remainder_theorem.py](./algorithms/maths/chinese_remainder_theorem.py)
+    * [combination.py](./algorithms/maths/combination.py)
+    * [cosine_similarity.py](./algorithms/maths/cosine_similarity.py)
+    * [decimal_to_binary_ip.py](./algorithms/maths/decimal_to_binary_ip.py)
+    * [diffie_hellman_key_exchange.py](./algorithms/maths/diffie_hellman_key_exchange.py)
+    * [euler_totient.py](./algorithms/maths/euler_totient.py)
+    * [extended_gcd.py](./algorithms/maths/extended_gcd.py)
+    * [factorial.py](./algorithms/maths/factorial.py)
+    * [find_order_simple.py](./algorithms/maths/find_order_simple.py)
+    * [find_primitive_root_simple.py](./algorithms/maths/find_primitive_root_simple.py)
+    * [gcd.py](./algorithms/maths/gcd.py)
+    * [generate_strobogrammtic.py](./algorithms/maths/generate_strobogrammtic.py)
+    * [hailstone.py](./algorithms/maths/hailstone.py)
+    * [is_strobogrammatic.py](./algorithms/maths/is_strobogrammatic.py)
+    * [krishnamurthy_number.py](./algorithms/maths/krishnamurthy_number.py)
+    * [magic_number.py](./algorithms/maths/magic_number.py)
+    * [modular_exponential.py](./algorithms/maths/modular_exponential.py)
+    * [modular_inverse.py](./algorithms/maths/modular_inverse.py)
+    * [next_bigger.py](./algorithms/maths/next_bigger.py)
+    * [next_perfect_square.py](./algorithms/maths/next_perfect_square.py)
+    * [nth_digit.py](./algorithms/maths/nth_digit.py)
+    * [num_digits.py](./algorithms/maths/num_digits.py)
+    * [polynomial.py](./algorithms/maths/polynomial.py)
+    * [power.py](./algorithms/maths/power.py)
+    * [prime_check.py](./algorithms/maths/prime_check.py)
+    * [primes_sieve_of_eratosthenes.py](./algorithms/maths/primes_sieve_of_eratosthenes.py)
+    * [pythagoras.py](./algorithms/maths/pythagoras.py)
+    * [rabin_miller.py](./algorithms/maths/rabin_miller.py)
+    * [recursive_binomial_coefficient.py](./algorithms/maths/recursive_binomial_coefficient.py)
+    * [rsa.py](./algorithms/maths/rsa.py)
+    * [sqrt_precision_factor.py](./algorithms/maths/sqrt_precision_factor.py)
+    * [summing_digits.py](./algorithms/maths/summing_digits.py)
+    * [symmetry_group_cycle_index.py](./algorithms/maths/symmetry_group_cycle_index.py)
+  * [matrix](./algorithms/matrix)
+    * [bomb_enemy.py](./algorithms/matrix/bomb_enemy.py)
+    * [cholesky_matrix_decomposition.py](./algorithms/matrix/cholesky_matrix_decomposition.py)
+    * [copy_transform.py](./algorithms/matrix/copy_transform.py)
+    * [count_paths.py](./algorithms/matrix/count_paths.py)
+    * [crout_matrix_decomposition.py](./algorithms/matrix/crout_matrix_decomposition.py)
+    * [matrix_exponentiation.py](./algorithms/matrix/matrix_exponentiation.py)
+    * [matrix_inversion.py](./algorithms/matrix/matrix_inversion.py)
+    * [multiply.py](./algorithms/matrix/multiply.py)
+    * [rotate_image.py](./algorithms/matrix/rotate_image.py)
+    * [search_in_sorted_matrix.py](./algorithms/matrix/search_in_sorted_matrix.py)
+    * [sort_matrix_diagonally.py](./algorithms/matrix/sort_matrix_diagonally.py)
+    * [sparse_dot_vector.py](./algorithms/matrix/sparse_dot_vector.py)
+    * [sparse_mul.py](./algorithms/matrix/sparse_mul.py)
+    * [spiral_traversal.py](./algorithms/matrix/spiral_traversal.py)
+    * [sudoku_validator.py](./algorithms/matrix/sudoku_validator.py)
+    * [sum_sub_squares.py](./algorithms/matrix/sum_sub_squares.py)
+  * [ml](./algorithms/ml)
+    * [nearest_neighbor.py](./algorithms/ml/nearest_neighbor.py)
+  * [queues](./algorithms/queues)
+    * [max_sliding_window.py](./algorithms/queues/max_sliding_window.py)
+    * [moving_average.py](./algorithms/queues/moving_average.py)
+    * [priority_queue.py](./algorithms/queues/priority_queue.py)
+    * [queue.py](./algorithms/queues/queue.py)
+    * [reconstruct_queue.py](./algorithms/queues/reconstruct_queue.py)
+    * [zigzagiterator.py](./algorithms/queues/zigzagiterator.py)
+  * [search](./algorithms/search)
+    * [binary_search.py](./algorithms/search/binary_search.py)
+    * [find_min_rotate.py](./algorithms/search/find_min_rotate.py)
+    * [first_occurrence.py](./algorithms/search/first_occurrence.py)
+    * [interpolation_search.py](./algorithms/search/interpolation_search.py)
+    * [jump_search.py](./algorithms/search/jump_search.py)
+    * [last_occurrence.py](./algorithms/search/last_occurrence.py)
+    * [linear_search.py](./algorithms/search/linear_search.py)
+    * [next_greatest_letter.py](./algorithms/search/next_greatest_letter.py)
+    * [search_insert.py](./algorithms/search/search_insert.py)
+    * [search_range.py](./algorithms/search/search_range.py)
+    * [search_rotate.py](./algorithms/search/search_rotate.py)
+    * [ternary_search.py](./algorithms/search/ternary_search.py)
+    * [two_sum.py](./algorithms/search/two_sum.py)
+  * [set](./algorithms/set)
+    * [find_keyboard_row.py](./algorithms/set/find_keyboard_row.py)
+    * [randomized_set.py](./algorithms/set/randomized_set.py)
+    * [set_covering.py](./algorithms/set/set_covering.py)
+  * [sort](./algorithms/sort)
+    * [bitonic_sort.py](./algorithms/sort/bitonic_sort.py)
+    * [bogo_sort.py](./algorithms/sort/bogo_sort.py)
+    * [bubble_sort.py](./algorithms/sort/bubble_sort.py)
+    * [bucket_sort.py](./algorithms/sort/bucket_sort.py)
+    * [cocktail_shaker_sort.py](./algorithms/sort/cocktail_shaker_sort.py)
+    * [comb_sort.py](./algorithms/sort/comb_sort.py)
+    * [counting_sort.py](./algorithms/sort/counting_sort.py)
+    * [cycle_sort.py](./algorithms/sort/cycle_sort.py)
+    * [gnome_sort.py](./algorithms/sort/gnome_sort.py)
+    * [heap_sort.py](./algorithms/sort/heap_sort.py)
+    * [insertion_sort.py](./algorithms/sort/insertion_sort.py)
+    * [meeting_rooms.py](./algorithms/sort/meeting_rooms.py)
+    * [merge_sort.py](./algorithms/sort/merge_sort.py)
+    * [pancake_sort.py](./algorithms/sort/pancake_sort.py)
+    * [pigeonhole_sort.py](./algorithms/sort/pigeonhole_sort.py)
+    * [quick_sort.py](./algorithms/sort/quick_sort.py)
+    * [radix_sort.py](./algorithms/sort/radix_sort.py)
+    * [selection_sort.py](./algorithms/sort/selection_sort.py)
+    * [shell_sort.py](./algorithms/sort/shell_sort.py)
+    * [sort_colors.py](./algorithms/sort/sort_colors.py)
+    * [stooge_sort.py](./algorithms/sort/stooge_sort.py)
+    * [top_sort.py](./algorithms/sort/top_sort.py)
+    * [wiggle_sort.py](./algorithms/sort/wiggle_sort.py)
+  * [stack](./algorithms/stack)
+    * [is_consecutive.py](./algorithms/stack/is_consecutive.py)
+    * [is_sorted.py](./algorithms/stack/is_sorted.py)
+    * [longest_abs_path.py](./algorithms/stack/longest_abs_path.py)
+    * [ordered_stack.py](./algorithms/stack/ordered_stack.py)
+    * [remove_min.py](./algorithms/stack/remove_min.py)
+    * [simplify_path.py](./algorithms/stack/simplify_path.py)
+    * [stack.py](./algorithms/stack/stack.py)
+    * [stutter.py](./algorithms/stack/stutter.py)
+    * [switch_pairs.py](./algorithms/stack/switch_pairs.py)
+    * [valid_parenthesis.py](./algorithms/stack/valid_parenthesis.py)
+  * [streaming](./algorithms/streaming)
+    * [misra_gries.py](./algorithms/streaming/misra_gries.py)
+    * [one_sparse_recovery.py](./algorithms/streaming/one_sparse_recovery.py)
+  * [strings](./algorithms/strings)
+    * [add_binary.py](./algorithms/strings/add_binary.py)
+    * [atbash_cipher.py](./algorithms/strings/atbash_cipher.py)
+    * [breaking_bad.py](./algorithms/strings/breaking_bad.py)
+    * [caesar_cipher.py](./algorithms/strings/caesar_cipher.py)
+    * [check_pangram.py](./algorithms/strings/check_pangram.py)
+    * [contain_string.py](./algorithms/strings/contain_string.py)
+    * [count_binary_substring.py](./algorithms/strings/count_binary_substring.py)
+    * [decode_string.py](./algorithms/strings/decode_string.py)
+    * [delete_reoccurring.py](./algorithms/strings/delete_reoccurring.py)
+    * [domain_extractor.py](./algorithms/strings/domain_extractor.py)
+    * [encode_decode.py](./algorithms/strings/encode_decode.py)
+    * [first_unique_char.py](./algorithms/strings/first_unique_char.py)
+    * [fizzbuzz.py](./algorithms/strings/fizzbuzz.py)
+    * [group_anagrams.py](./algorithms/strings/group_anagrams.py)
+    * [int_to_roman.py](./algorithms/strings/int_to_roman.py)
+    * [is_palindrome.py](./algorithms/strings/is_palindrome.py)
+    * [is_rotated.py](./algorithms/strings/is_rotated.py)
+    * [judge_circle.py](./algorithms/strings/judge_circle.py)
+    * [knuth_morris_pratt.py](./algorithms/strings/knuth_morris_pratt.py)
+    * [license_number.py](./algorithms/strings/license_number.py)
+    * [longest_common_prefix.py](./algorithms/strings/longest_common_prefix.py)
+    * [longest_palindromic_substring.py](./algorithms/strings/longest_palindromic_substring.py)
+    * [make_sentence.py](./algorithms/strings/make_sentence.py)
+    * [merge_string_checker.py](./algorithms/strings/merge_string_checker.py)
+    * [min_distance.py](./algorithms/strings/min_distance.py)
+    * [multiply_strings.py](./algorithms/strings/multiply_strings.py)
+    * [one_edit_distance.py](./algorithms/strings/one_edit_distance.py)
+    * [panagram.py](./algorithms/strings/panagram.py)
+    * [rabin_karp.py](./algorithms/strings/rabin_karp.py)
+    * [repeat_string.py](./algorithms/strings/repeat_string.py)
+    * [repeat_substring.py](./algorithms/strings/repeat_substring.py)
+    * [reverse_string.py](./algorithms/strings/reverse_string.py)
+    * [reverse_vowel.py](./algorithms/strings/reverse_vowel.py)
+    * [reverse_words.py](./algorithms/strings/reverse_words.py)
+    * [roman_to_int.py](./algorithms/strings/roman_to_int.py)
+    * [rotate.py](./algorithms/strings/rotate.py)
+    * [strip_url_params.py](./algorithms/strings/strip_url_params.py)
+    * [strong_password.py](./algorithms/strings/strong_password.py)
+    * [text_justification.py](./algorithms/strings/text_justification.py)
+    * [unique_morse.py](./algorithms/strings/unique_morse.py)
+    * [validate_coordinates.py](./algorithms/strings/validate_coordinates.py)
+    * [word_squares.py](./algorithms/strings/word_squares.py)
+  * [tree](./algorithms/tree)
+    * [b_tree.py](./algorithms/tree/b_tree.py)
+    * [bin_tree_to_list.py](./algorithms/tree/bin_tree_to_list.py)
+    * [binary_tree_paths.py](./algorithms/tree/binary_tree_paths.py)
+    * [construct_tree_postorder_preorder.py](./algorithms/tree/construct_tree_postorder_preorder.py)
+    * [deepest_left.py](./algorithms/tree/deepest_left.py)
+    * [invert_tree.py](./algorithms/tree/invert_tree.py)
+    * [is_balanced.py](./algorithms/tree/is_balanced.py)
+    * [is_subtree.py](./algorithms/tree/is_subtree.py)
+    * [is_symmetric.py](./algorithms/tree/is_symmetric.py)
+    * [longest_consecutive.py](./algorithms/tree/longest_consecutive.py)
+    * [lowest_common_ancestor.py](./algorithms/tree/lowest_common_ancestor.py)
+    * [max_height.py](./algorithms/tree/max_height.py)
+    * [max_path_sum.py](./algorithms/tree/max_path_sum.py)
+    * [min_height.py](./algorithms/tree/min_height.py)
+    * [path_sum.py](./algorithms/tree/path_sum.py)
+    * [path_sum2.py](./algorithms/tree/path_sum2.py)
+    * [pretty_print.py](./algorithms/tree/pretty_print.py)
+    * [same_tree.py](./algorithms/tree/same_tree.py)
+    * [tree.py](./algorithms/tree/tree.py)
+    * [avl](./algorithms/tree/avl)
+      * [avl.py](./algorithms/tree/avl/avl.py)
+    * [bst](./algorithms/tree/bst)
+      * [BSTIterator.py](./algorithms/tree/bst/BSTIterator.py)
+      * [array_to_bst.py](./algorithms/tree/bst/array_to_bst.py)
+      * [bst.py](./algorithms/tree/bst/bst.py)
+      * [bst_closest_value.py](./algorithms/tree/bst/bst_closest_value.py)
+      * [count_left_node.py](./algorithms/tree/bst/count_left_node.py)
+      * [delete_node.py](./algorithms/tree/bst/delete_node.py)
+      * [depth_sum.py](./algorithms/tree/bst/depth_sum.py)
+      * [height.py](./algorithms/tree/bst/height.py)
+      * [is_bst.py](./algorithms/tree/bst/is_bst.py)
+      * [kth_smallest.py](./algorithms/tree/bst/kth_smallest.py)
+      * [lowest_common_ancestor.py](./algorithms/tree/bst/lowest_common_ancestor.py)
+      * [num_empty.py](./algorithms/tree/bst/num_empty.py)
+      * [predecessor.py](./algorithms/tree/bst/predecessor.py)
+      * [serialize_deserialize.py](./algorithms/tree/bst/serialize_deserialize.py)
+      * [successor.py](./algorithms/tree/bst/successor.py)
+      * [unique_bst.py](./algorithms/tree/bst/unique_bst.py)
+    * [fenwick_tree](./algorithms/tree/fenwick_tree)
+      * [fenwick_tree.py](./algorithms/tree/fenwick_tree/fenwick_tree.py)
+    * [red_black_tree](./algorithms/tree/red_black_tree)
+      * [red_black_tree.py](./algorithms/tree/red_black_tree/red_black_tree.py)
+    * [segment_tree](./algorithms/tree/segment_tree)
+      * [iterative_segment_tree.py](./algorithms/tree/segment_tree/iterative_segment_tree.py)
+      * [segment_tree.py](./algorithms/tree/segment_tree/segment_tree.py)
+    * [traversal](./algorithms/tree/traversal)
+      * [inorder.py](./algorithms/tree/traversal/inorder.py)
+      * [level_order.py](./algorithms/tree/traversal/level_order.py)
+      * [postorder.py](./algorithms/tree/traversal/postorder.py)
+      * [preorder.py](./algorithms/tree/traversal/preorder.py)
+      * [zigzag.py](./algorithms/tree/traversal/zigzag.py)
+    * [trie](./algorithms/tree/trie)
+      * [add_and_search.py](./algorithms/tree/trie/add_and_search.py)
+      * [trie.py](./algorithms/tree/trie/trie.py)
+  * [unionfind](./algorithms/unionfind)
+    * [count_islands.py](./algorithms/unionfind/count_islands.py)
+  * [unix](./algorithms/unix)
+    * [path](./algorithms/unix/path)
+      * [full_path.py](./algorithms/unix/path/full_path.py)
+      * [join_with_slash.py](./algorithms/unix/path/join_with_slash.py)
+      * [simplify_path.py](./algorithms/unix/path/simplify_path.py)
+      * [split.py](./algorithms/unix/path/split.py)
+<!--/fnc_list-->
 ## Contributors
 
 Thanks to [all the contributors](https://github.com/keon/algorithms/graphs/contributors)
diff --git a/scripts/update_functions_list.py b/scripts/update_functions_list.py
new file mode 100644
index 000000000..db61d2980
--- /dev/null
+++ b/scripts/update_functions_list.py
@@ -0,0 +1,25 @@
+import os
+
+fnc_list = "<!--fnc_list-->\n" # prefix + implemented functions list
+for (path, dir, folders) in sorted(os.walk("./algorithms"))[1:]: # first folder is 'algorithms' so skiped that
+    
+    if '.py' not in path.split(os.path.sep)[-1]:
+        fnc_list += (path.count(os.sep)-1) * "  " + '* [' + path.split(os.path.sep)[-1] + '](' + path + ')\n'
+    for filename in sorted(folders):       
+        ext = os.path.splitext(filename)[-1]
+        if ext == '.py' and filename != '__init__.py':
+            fnc_list += path.count(os.sep) * "  " + '* [' + filename + '](' + os.path.join(path, filename) + ')\n'
+            
+fnc_list += "<!--/fnc_list-->\n" # suffix
+  
+f = open("README.md", 'r')
+README = f.read() # read existing README.md
+f.close()
+
+f = open("README.md", 'w')
+# change existing implemented functions list to new list
+replace_str = '<!--fnc_list-->' + README.split('<!--fnc_list-->')[1].split('<!--/fnc_list-->')[0] + '<!--/fnc_list-->\n'
+README = README.replace(replace_str, fnc_list) 
+f.write(README) # update README.md
+f.close()
+