# algo-learn
学习数据结构与算法的代码示例，目前提供 Java、Python、Go 支持（C++ 也慢慢开始了）。维护这个 Repository 的目的有两个：
* 编程是一门实践的艺术，多多练习，多多思考，把这里列举的所有算法、数据结构，以及对应的常见 leetcode 习题都自己手敲几遍，增强自己的**编码基本功**，写出高质量的代码。
* 同时也给刷题的朋友一些指导，面对 Leetcode 上千道题目，可能会觉得手足无措，想刷题但是又不知道从哪里开始。
这里记录的是我自己的刷题过程，基本上都是一些 easy 和 medium 的题目，并且分类详细，你可以参考这个顺序，然后有针对性的去刷题。
这些题目在面试中也是比较高频的，**应对大多数面试**已经是绰绰有余了。
**Repo 逐步完善中，欢迎补充更多题目，以及贡献代码！**
## 数组
* 实现一个动态扩容的数组【[Java](https://github.com/roseduan/algo-learn/blob/master/java/datastructure/array/GenericArray.java)、[Python](https://github.com/roseduan/algo-learn/blob/master/python/array/array.py)、[Go](https://github.com/roseduan/algo-learn/blob/master/go/array/array.go)】
* 常见 leetcode 练习题：
| 题号 | 题目名称 | 解题代码 | 难度 |
| :------: | :----------------------------------------------------------: | :----------------------------------------------------------: | :------: |
| 1 | [两数之和](https://leetcode-cn.com/problems/two-sum/) | [Java](https://github.com/roseduan/algo-learn/blob/master/java/datastructure/array/leetcode/TwoSum.java)、[Python](https://github.com/roseduan/algo-learn/blob/master/python/array/leetcode/two_sum.py)、[Go](https://github.com/roseduan/algo-learn/blob/master/go/array/leetcode/two_sum.go)、[C++](https://github.com/roseduan/algo-learn/blob/master/cpp/array/two_sum.cpp) | 简单 |
| 283 | [移动零](https://leetcode-cn.com/problems/move-zeroes/) | [Java](https://github.com/roseduan/algo-learn/blob/master/java/datastructure/array/leetcode/MoveZero.java)、[Python](https://github.com/roseduan/algo-learn/blob/master/python/array/leetcode/move_zero.py)、[Go](https://github.com/roseduan/algo-learn/blob/master/go/array/leetcode/move_zero.go)、[C++](https://github.com/roseduan/algo-learn/blob/master/cpp/array/move_zeros.cpp) | 简单 |
| 217 | [存在重复元素](https://leetcode-cn.com/problems/contains-duplicate/) | [Java](https://github.com/roseduan/algo-learn/blob/master/java/datastructure/array/leetcode/ContainsDuplicate.java)、[Python](https://github.com/roseduan/algo-learn/blob/master/python/array/leetcode/contains_duplicate.py)、[Go](https://github.com/roseduan/algo-learn/blob/master/go/array/leetcode/contains_duplicate.go)、[C++](https://github.com/roseduan/algo-learn/blob/master/cpp/array/%20contains_duplicate.cpp) | 简单 |
| 219 | [存在重复元素 II](https://leetcode-cn.com/problems/contains-duplicate-ii/) | [Java](https://github.com/roseduan/algo-learn/blob/master/java/datastructure/array/leetcode/ContainsDuplicateII.java)、[Python](https://github.com/roseduan/algo-learn/blob/master/python/array/leetcode/contains_duplicate_ii.py)、[Go](https://github.com/roseduan/algo-learn/blob/master/go/array/leetcode/contains_duplicate_ii.go)、[C++](https://github.com/roseduan/algo-learn/blob/master/cpp/array/contains_duplicate_ii.cpp) | 简单 |
| 66 | [加一](https://leetcode-cn.com/problems/plus-one/) | [Java](https://github.com/roseduan/algo-learn/blob/master/java/datastructure/array/leetcode/PlusOne.java)、[Python](https://github.com/roseduan/algo-learn/blob/master/python/array/leetcode/plus_one.py)、[Go](https://github.com/roseduan/algo-learn/blob/master/go/array/leetcode/plus_one.go)、[C++](https://github.com/roseduan/algo-learn/blob/master/cpp/array/plus_one.cpp) | 简单 |
| 136 | [只出现一次的数字](https://leetcode-cn.com/problems/single-number/) | [Java](https://github.com/roseduan/algo-learn/blob/master/java/datastructure/array/leetcode/SingleNumber.java)、[Python](https://github.com/roseduan/algo-learn/blob/master/python/array/leetcode/single_number.py)、[Go](https://github.com/roseduan/algo-learn/blob/master/go/array/leetcode/single_number.go)、[C++](https://github.com/roseduan/algo-learn/blob/master/cpp/array/single_number.cpp) | 简单 |
| 121 | [买卖股票的最佳时机 I](https://leetcode-cn.com/problems/best-time-to-buy-and-sell-stock/) | [Java](https://github.com/roseduan/algo-learn/blob/master/java/datastructure/array/leetcode/BestTimeBuySellStock.java)、[Python](https://github.com/roseduan/algo-learn/blob/master/python/array/leetcode/best_time_buy_sell_stock.py)、[Go](https://github.com/roseduan/algo-learn/blob/master/go/array/leetcode/best_time_buy_sell_stock.go) | 简单 |
| 122 | [买卖股票的最佳时机 II](https://leetcode-cn.com/problems/best-time-to-buy-and-sell-stock-ii/) | [Java](https://github.com/roseduan/algo-learn/blob/master/java/datastructure/array/leetcode/BestTimeBuySellStockII.java)、[Python](https://github.com/roseduan/algo-learn/blob/master/python/array/leetcode/best_time_buy_sell_stock_ii.py)、[Go](https://github.com/roseduan/algo-learn/blob/master/go/array/leetcode/best_time_buy_sell_stock_ii.go) | 简单 |
| 88 | [合并两个有序数组](https://leetcode-cn.com/problems/merge-sorted-array/) | [Java](https://github.com/roseduan/algo-learn/blob/master/java/datastructure/array/leetcode/MergeSortedArray.java)、[Python](https://github.com/roseduan/algo-learn/blob/master/python/array/leetcode/merge_sorted_array.py)、[Go](https://github.com/roseduan/algo-learn/blob/master/go/array/leetcode/merge_sorted_array.go)、[C++](https://github.com/roseduan/algo-learn/blob/master/cpp/array/merge_sorted_array.cpp) | 简单 |
| 26 | [删除排序数组中的重复项](https://leetcode-cn.com/problems/remove-duplicates-from-sorted-array/) | [Java](https://github.com/roseduan/algo-learn/blob/master/java/datastructure/array/leetcode/RemoveDuplicates.java)、[Python](https://github.com/roseduan/algo-learn/blob/master/python/array/leetcode/remove_deulicates.py)、[Go](https://github.com/roseduan/algo-learn/blob/master/go/array/leetcode/remove_duplicate.go)、[C++](https://github.com/roseduan/algo-learn/blob/master/cpp/array/remove_duplicates.cpp) | 简单 |
| 118 | [杨辉三角](https://leetcode-cn.com/problems/pascals-triangle/) | [Java](https://github.com/roseduan/algo-learn/blob/master/java/datastructure/array/leetcode/PascalsTriangle.java)、[Python](https://github.com/roseduan/algo-learn/blob/master/python/array/leetcode/pascals_triangle.py)、[Go](https://github.com/roseduan/algo-learn/blob/master/go/array/leetcode/pascals_triangle.go)、[C++](https://github.com/roseduan/algo-learn/blob/master/cpp/array/pascals_triangle.cpp) | 简单 |
| 169 | [多数元素](https://leetcode-cn.com/problems/majority-element/) | [Java](https://github.com/roseduan/algo-learn/blob/master/java/datastructure/array/leetcode/MajorityElement.java)、[Python](https://github.com/roseduan/algo-learn/blob/master/python/array/leetcode/majority_element.py)、[Go](https://github.com/roseduan/algo-learn/blob/master/go/array/leetcode/majority_element.go)、[C++](https://github.com/roseduan/algo-learn/blob/master/cpp/array/majority_element.cpp) | 简单 |
| 15 | [三数之和](https://leetcode-cn.com/problems/3sum/) | [Java](https://github.com/roseduan/algo-learn/blob/master/java/datastructure/array/leetcode/ThreeSum.java)、[Python](https://github.com/roseduan/algo-learn/blob/master/python/array/leetcode/three_sum.py)、[Go](https://github.com/roseduan/algo-learn/blob/master/go/array/leetcode/three_sum.go)、[C++](https://github.com/roseduan/algo-le
学习数据结构与算法的代码示例，目前提供 Java、Python、Go、C++ 多种语言支持。.zip （542个子文件） 
sort_linked_list.cpp 2KB binary_tree_level_order_ii.cpp 2KB binary_tree_level_order.cpp 2KB valid_bst.cpp 2KB path_sum.cpp 2KB binary_tree_right_side_view.cpp 1KB palindrome_linked_list.cpp 1KB three_sum.cpp 1KB first_last_in_array.cpp 1KB add_two_numbers_ii.cpp 1KB binary_tree_min_height.cpp 1KB binary_tree_preorder.cpp 1KB remove_nth_node.cpp 1KB invert_binary_tree.cpp 1KB add_two_numbers.cpp 1KB binary_tree_postorder.cpp 1KB merge_sort.cpp 1KB kth_smallest_element_bst.cpp 1KB nary_tree_max_height.cpp 1KB binary_tree_max_height.cpp 1KB mege_sorted_list.cpp 1KB binary_tree_inorder.cpp 1KB swap_node_pairs.cpp 1KB two_sum.cpp 1KB majority_element.cpp 1KB valid_parentheses.cpp 1KB rotate_array.cpp 1KB linked_list_cycle_ii.cpp 1KB binary_search.cpp 1KB intersection_two_lists.cpp 1KB lowest_common_ancestor_binary_tree.cpp 979B container_with_most_water.cpp 974B stack_use_queue.cpp 955B linked_list_cycle.cpp 953B merge_sorted_array.cpp 930B queue_use_stack.cpp 875B search_rotate_array.cpp 861B contains_duplicate_ii.cpp 835B middle_node_list.cpp 823B find_min_rotated_array.cpp 797B move_zeros.cpp 788B odd_even_list.cpp 777B single_number.cpp 657B selection_sort.cpp 656B contains_duplicate.cpp 655B pascals_triangle.cpp 603B reverse_list.cpp 591B remove_duplicate_sorted_list.cpp 563B single_non_duplicate.cpp 542B bubble_sort.cpp 535B first_bad_version.cpp 525B remove_duplicates.cpp 465B plus_one.cpp 446B min_stack.cpp 444B sqrtx.cpp 408B binary_tree_max_width.cpp 392B flatten_binary_tree_to_linked_list.cpp 380B .gitignore 68B doubly_linkedlist.go 2KB array.go 2KB circular_linkedlist.go 2KB singly_linked_list.go 2KB design_circular_deque.go 2KB number_of_isalands.go 2KB topk_frequent_elements.go 2KB binary_tree_postorder_traversal.go 1KB valid_bst.go 1KB array_queue.go 1KB largest_rectangle_in_histogram.go 1KB array_stack.go 1KB binary_tree_inorder_traversal.go 1KB minimum_path_sum.go 1KB singly_linked_list_test.go 1KB binary_search_tree.go 1KB circular_linkedlist_test.go 1KB binary_heap.go 1KB sort_linked_list.go 1KB linked_stack.go 1KB minimum_depth_binary_tree.go 1KB doubly_linkedlist_test.go 1KB reverse_nodes_in_k_group.go 1KB circular_queue.go 1KB valid_bst.go 1KB three_sum.go 1KB valid_parentheses.go 1KB nqueues_ii.go 1KB linked_queue.go 1KB first_and_last_in_sorted_array.go 1KB add_two_numbers_ii.go 1KB design_circular_queue.go 1KB generate_parentheses.go 1000B sum_root_leaf_numbers.go 986B merge_sorted_array.go 982B set_matrix_zeros.go 975B bucket_sort.go 938B relative_sort_array.go 937B min_kth_element.go 924B has_path_sum.go 921B binary_tree_level_order_traversal.go 917B word_search.go 906B共 542 条
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