/LeetCode

Awesome LeetCode Summary of topics

LeetCode-StrugglingXu

该LeetCode内容主要包含两部分：

  • LeetCode 顺序刷题参考
  • 答案集题型分类汇总

LeetCode 顺序刷题参考

答案集题型分类汇总

各类题目难度等级由低到高，按照顺序练习即可。。。

数组类题目

  • K-SUM类题目
题目序号 leetcode链接 难度 复杂度 答案传送
1 Two Sum easy
167 Two Sum II - Input array is sorted Easy
15 3Sum Medium
16 3Sum Closest Medium
259 3Sum Smaller Medium
18 4Sum Medium

区间问题

题目序号 leetcode链接 难度 复杂度 答案传送
56 Merge Intervals Medium
57 Insert Interval Hard
252 Meeting Rooms easy
253 Meeting Rooms II medium
352 Data Stream as Disjoint Intervals hard

子数组类题目

题目序号 leetcode链接 难度 复杂度 答案传送
78 Subsets medium
90 Subsets II medium
53 Maximum Subarray easy
152 Maximum Product Subarray medium
239 Sliding Window Maximum hard
295 Find Median from Data Stream hard
228 Summary Ranges medium
163 Missing Ranges medium
325 Maximum Size Subarray Sum Equals k medium
209 Minimum Size Subarray Sum medium
238 Product of Array Except Self medium
128 Longest Consecutive Sequence Hard

Rotate类题目

序号 题目 难度 代码
48 Rotate Image Medium
89 Search in Rotated Sorted Array Medium
189 Rotate Array Easy
81 Search in Rotated Sorted Array II Medium

数组排序

序号 题目 难度 代码
88 Merge Sorted Array Easy
75 Sort Colors Medium
283 Move Zeroes Easy
376 Wiggle Subsequence medium
280 Wiggle Sort medium
324 Wiggle Sort II medium
215 Kth Largest Element in an Array medium
287 Find the Duplicate Number medium
334 Increasing Triplet Subsequence medium
400 Nth Digit easy
387 First Unique Character in a String easy
164 Maximum Gap hard
347 Top K Frequent Elements medium
243 Shortest Word Distance easy
244 Shortest Word Distance II medium
245 Shortest Word Distance III medium

双指针问题

序号 题目 难度 代码
11 Container With Most Water Medium
41 First Missing Positive Hard
42 Trapping Rain Water Hard
84 Largest Rectangle in Histogram Hard
85 Maximal Rectangle Hard
243 Shortest Word Distance Easy
244 Shortest Word Distance II medium
245 Shortest Word Distance III Medium

二维数组

序号 题目 难度 代码
48 Rotate Image Medium
54 Spiral Matrix Medium
73 Set Matrix Zeroes Medium
311 Sparse Matrix Multiplication medium
36 Valid Sudoku meidum
37 Sudoku Solver hard

动态规划

序号 题目 难度 代码
62 Unique Paths Medium
63 Unique Paths II Medium
64 Minimum Path Sum Medium
120 Triangle Medium

二叉树

序号 题目 难度 代码
105 Construct Binary Tree from Preorder and Inorder Traversal Medium
106 Construct Binary Tree from Inorder and Postorder Traversal Medium

Math

序号 题目 难度 代码
66 Plus One Easy
118 Pascal's Triangle Easy
119 Pascal's Triangle II Easy

基础

基础题目
序号 题目 难度 代码
217 Contains Duplicate Easy
219 Contains Duplicate II Easy
380 Insert Delete GetRandom O(1) Medium
381 Insert Delete GetRandom O(1) - Duplicates allowed Hard
31 Next Permutation Medium
Search类题
序号 题目 难度 代码
33 Search in Rotated Sorted Array Medium
81 Search in Rotated Sorted Array II Medium
34 Find First and Last Position of Element in Sorted Array Medium
35 Search Insert Position Easy
74 Search a 2D Matrix Medium
79 Word Search Medium
153 Find Minimum in Rotated Sorted Array Medium
154 Find Minimum in Rotated Sorted Array II Hard
39 Combination Sum Medium
40 Combination Sum II Medium
216 Combination Sum III Medium
45 Jump Game II Hard
55 Jump Game Medium
121 Best Time to Buy and Sell Stock Easy
122 Best Time to Buy and Sell Stock II Easy
123 Best Time to Buy and Sell Stock III Hard
126 Word Ladder II Hard
162 Find Peak Element Medium
169 Majority Element Easy
229 Majority Element II Medium
Remove类题目
序号 题目 难度 代码
26 Remove Duplicates from Sorted Array Easy
27 Remove Element Easy
80 Remove Duplicates from Sorted Array II Medium

提高题目

序号 题目 难度 代码
4 Median of Two Sorted Arrays Hard
289 Game of Life Medium

综合题

序号 题目 难度 代码
274 H-Index medium
376 Wiggle Subsequence medium
277 Find the Celebrity medium
370 Range Addition medium
296 Best Meeting Point hard

链表类题目

删除类题目

序号 题目 难度 代码
19 Remove Nth Node From End of List medium
82 Remove Duplicates from Sorted List II Medium
83 Remove Duplicates from Sorted List Easy
203 Remove Linked List Elements Easy
237 Delete Node in a Linked List Easy

翻转类题目

序号 题目 难度 代码
25 Reverse Nodes in k-Group Hard
61 Rotate List Medium
92 Reverse Linked List II Medium
206 Reverse Linked List Easy

合并链表

序号 题目 难度 代码
2 Add Two Numbers medium
21 Merge Two Sorted Lists Easy
23 Merge k Sorted Lists Hard
445 Add Two Numbers II Medium

环

序号 题目 难度 代码
141 Linked List Cycle Easy
142 Linked List Cycle II Medium
708 Insert into a Cyclic Sorted List Medium

拆分链表

序号 题目 难度 代码
725 Split Linked List in Parts Medium
86 Partition List Medium

排序链表

序号 题目 难度 代码
143 Reorder List Medium
147 Insertion Sort List Medium
148 Sort List Medium

基础

序号 题目 难度 代码
109 Convert Sorted List to Binary Search Tree Medium
138 Copy List with Random Pointer Medium
160 Intersection of Two Linked Lists Easy
234 Palindrome Linked List Easy
328 Odd Even Linked List Medium
369 Plus One Linked List Medium
379 Design Phone Directory Medium
426 Convert Binary Search Tree to Sorted Doubly Linked List Medium
430 Flatten a Multilevel Doubly Linked List Medium
707 Design Linked List Easy
817 Linked List Components Medium
876 Middle of the Linked List Easy

栈·题目

  • 基础题型

  • 表达式计算

  • 迭代极值

  • 栈的应用

树类型题目

二分查找题目

动态规划·题目