Leecode

Python solutions and notes for LeetCode-style algorithm problems.

这个仓库用于整理刷题代码、题解笔记和常见算法模板。每道题通常独立放在一个目录中，目录名包含题号和题目英文缩写，方便按题号查找和复盘。

Repository Layout

.
├── id001_two_sum/
│   ├── README.md
│   └── solution.py
├── id002_add_two_numbers/
│   ├── README.md
│   └── solution.py
├── 排序/
│   ├── README.md
│   └── sort_array.py
└── 树的遍历/
    ├── README.md
    ├── traversal_templates.py
    └── 递归转迭代.md

Contents

• idXXX_problem_name/: 单题目录，包含题解说明和 Python 实现。
• README.md: 对应题目的思路、复杂度或复盘记录。
• solution.py: 主要解法代码。
• 排序/: 排序算法相关模板和笔记。
• 树的遍历/: 二叉树遍历模板、递归转迭代笔记。

Solved Problems

当前已整理 101 道题：

#	Problem	Directory
1	Two Sum	id001_two_sum
2	Add Two Numbers	id002_add_two_numbers
3	Length Longest Substring	id003_length_longest_substring
4	Median Of Two Sorted Arrays	id004_median_of_two_sorted_arrays
5	Longest Palindromic Substring	id005_longest_palindromic_substring
11	Max Area	id011_max_area
15	Three Sum	id015_three_sum
17	Letter Combinations Of A Phone Number	id017_letter_combinations_of_a_phone_number
19	Remove Nth From End	id019_remove_nth_from_end
20	Valid Parentheses	id020_valid_parentheses
21	Merge Two Lists	id021_merge_two_lists
22	Generate Parentheses	id022_generate_parentheses
23	Merge K Lists	id023_merge_k_lists
24	Swap Pairs	id024_swap_pairs
25	Reverse K Groups	id025_reverse_k_groups
31	Next Permutation	id031_next_permutation
32	Longest Valid Parentheses	id032_longest_valid_parentheses
33	Search In Rotated Sorted Array	id033_search_in_rotated_sorted_array
34	Find First And Last Position	id034_find_first_and_last_position
35	Search Insert Position	id035_search_insert_position
39	Combination Sum	id039_combination_sum
41	First Missing Positive	id041_first_missing_positive
42	Trap	id042_trap
45	Jump Game Ii	id045_jump_game_ii
46	Permutations	id046_permutations
48	Rotate	id048_rotate
49	Group Anagrams	id049_group_anagrams
51	N Queens	id051_n_queens
53	Max Subarray	id053_max_subarray
54	Spiral Order	id054_spiral_order
55	Jump Game	id055_jump_game
56	Merge	id056_merge
62	Unique Paths	id062_unique_paths
64	Minimum Path Sum	id064_minimum_path_sum
70	Climbing Stairs	id070_climbing_stairs
72	Edit Distance	id072_edit_distance
73	Set Zeros	id073_set_zeros
74	Search A 2d Matrix	id074_search_a_2d_matrix
75	Sort Colors	id075_sort_colors
76	Min Window	id076_min_window
78	Subsets	id078_subsets
79	Word Search	id079_word_search
84	Largest Rectangle In Histogram	id084_largest_rectangle_in_histogram
94	Inorder Traversal	id094_inorder_traversal
98	Is Valid Bst	id098_is_valid_bst
101	Is Symmetric	id101_is_symmetric
102	Level Order	id102_level_order
104	Max Depth	id104_max_depth
105	Build Tree	id105_build_tree
108	Sorted Array To Bst	id108_sorted_array_to_bst
114	Flatten Binary Tree	id114_flatten_binary_tree
118	Pascals Triangle	id118_pascals_triangle
121	Best Time To Buy And Sell Stock	id121_best_time_to_buy_and_sell_stock
124	Binary Tree Max Path Sum	id124_binary_tree_max_path_sum
128	Longest Consecutive	id128_longest_consecutive
131	Palindrome Partitioning	id131_palindrome_partitioning
136	Single Number	id136_single_number
138	Copy Random List	id138_copy_random_list
139	Word Break	id139_word_break
141	Has Cycle	id141_has_cycle
142	Detect Cycle	id142_detect_cycle
146	LRU Cache	id146_lru_cache
148	Sort List	id148_sort_list
152	Maximum Product Subarray	id152_maximum_product_subarray
153	Find Minimum In Rotated Sorted Array	id153_find_minimum_in_rotated_sorted_array
155	Min Stack	id155_min_stack
160	Get Intersection Node	id160_get_intersection_node
169	Majority Element	id169_majority_element
189	Rotate	id189_rotate
198	House Robber	id198_house_robber
199	Right Side View	id199_right_side_view
200	Number Of Islands	id200_number_of_islands
206	Reverse List	id206_reverse_list
207	Course Schedule	id207_course_schedule
208	Implement Trie	id208_implement_trie
215	Kth Largest Element In Array	id215_kth_largest_element_in_array
226	Invert Tree	id226_invert_tree
230	Kth Smallest	id230_kth_smallest
234	Is Palindrome	id234_is_palindrome
236	Lowest Common Ancestor	id236_lowest_common_ancestor
238	Product Except Self	id238_product_except_self
239	Sliding Window Maximum	id239_sliding_window_maximum
240	Search Matrix	id240_search_matrix
279	Perfect Squares	id279_perfect_squares
283	Move Zeros	id283_move_zeros
287	Find The Duplicate Number	id287_find_the_duplicate_number
289	Game Of Life	id289_game_of_life
295	Find Median From Data Stream	id295_find_median_from_data_stream
300	Longest Increasing Subsequence	id300_longest_increasing_subsequence
322	Coin Change	id322_coin_change
347	Top K Frequent Elements	id347_top_k_frequent_elements
394	Decode String	id394_decode_string
416	Partition Equal Subset Sum	id416_partition_equal_subset_sum
437	Path Sum Iii	id437_path_sum_iii
438	Find Anagram	id438_find_anagram
543	Diameter Of Binary Tree	id543_diameter_of_binary_tree
560	Sub Array Sum	id560_sub_array_sum
739	Daily Temperatures	id739_daily_temperatures
763	Partition Labels	id763_partition_labels
994	Rotting Oranges	id994_rotting_oranges
1143	Longest Common Subsequence	id1143_longest_common_subsequence

Usage

进入某个题目目录后，可以直接运行对应的 Python 文件：

cd D:\code\leecode\id001_two_sum
python solution.py

部分目录可能包含额外脚本，例如测试、benchmark 或模板文件，可以按文件名直接运行：

python test_hash_table.py
python benchmark_hash_table.py

Notes

• 代码以 Python 为主。
• 题目目录按题号排序，适合持续补充。
• .idea/、__pycache__/、.pyc 等本地文件已通过 .gitignore 排除。

License

This repository is for personal learning and interview practice.