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LeetCode
├── Golang
└── Java

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LeetCode

NO. Title Solution Difficulty Category Y&N
1 Two Sum Java、Go Easy Array !!!
2 Add-Two-Numbers [Java](. /java/list/AddTwoNumbers.java) Medium List ?
3 Longest Substring Without Repeating Characters Go Medium Two Pointers ?
5 Longest-Palindromic-Substring Java Medium DP ?
8 String-To-Integer-Atoi Java Medium String ?
11 Container With Most Water Java、Go Medium Two Pointers ??
14 Longest-Common-Prefix Java Easy String ?
15 3Sum Java Medium Two Pointers ??
16 3Sum-Closest Go Medium Two Pointers ?
17 Letter-Combinations-Of-A-Phone-Number Java Medium Recursion ?
19 Remove-Nth-Node Java Medium Two Pointers ?!
20 Valid Parentheses Java Easy Stack ??!
21 Merge Two Sorted Lists Java Easy Recursion ?!
22 Generate Parentheses Java Medium DFS ??
24 Swap Nodes in Pairs Java Medium ???
25 Reverse Nodes in k-Group Java Hard ?
26 Remove Duplicates from Sorted Array Java Easy Two Pointers ?!
32 Longest Valid Parentheses Hard
33 Search-In-Rotated-Sorted-Array Java Medium ?
36 Valid-Sudoku Java Medium ?
37 Sudoku-Solver Java Hard ?
39 Combination-Sum Java Medium DFS ?
42 Trapping Rain Water♥ Java Hard Stack、DP !?
44 Wildcard-Matching Java Hard DP ?
45 Jump-Game-ii Java Hard ?
46 Permutations Java Medium ?
47 Permutations II Java Medium ?
49 Group Anagrams Java Medium HashMap !?
50 PowX-N Java Medium ?
51 N-Queens Java Hard Backtracking ?
52 N-Queens-ii Hard
53 Maximum-Subarray Java Easy !?
54 Spiral-Matrix Medium
55 Jump-Game Java Medium Greedy ?！
56 Merge-Intervals Java Medium ?
58 Length-Of-Last-Word Java Easy String !
59 Spiral-Matrix-ii Java Medium Matrix ?
62 Unique-Paths Java Medium DP !?
63 Unique-Paths-ii Java Medium ?
64 Minimum Path Sum Java Medium ?
66 Plus One Java Easy !?
69 Sqrtx Java Easy !
70 Climbing-Stairs Java Easy !!!
72 Edit Distance♥ Java Hard DP ?
74 Search-A-2d-Matrix Java Medium !
75 Sort-Colors Java Medium Array !
76 Minimum Window Substring Hard
77 Combinations Java Medium ?
78 Subsets Java Medium Backtracking ??
79 Word-Search Java Medium DFS ？
83 Remove-Duplicates-From-Sorted-List Java Easy !！
84 Largest Rectangle in Histogram Java Hard Stack !?
85 Maximal-Rectangle Hard
91 Decode Ways Java Medium DP ?
88 Merge Sorted Array Java Easy ?!
94 Binary Tree Inorder Traversal Java Medium !
98 Validate Binary Search Tree Java Medium !
101 symmetric-tree Easy Tree !
102 Binary Tree Level Order Traversal Java Medium BFS !??
104 Maximum Depth of Binary Tree Java Easy Recursion ?!!!
105 Construct Binary Tree from Preorder and Inorder Traversal Java Medium !
108 Convert Sorted Array to Binary Search Tree Easy Tree ?
109 Convert-Sorted-List-To-Binary-Search-Tree Java Medium Tree ?
110 Balanced-Binary-Tree Java Easy Tree !??
111 Minimum Depth of Binary Tree Java Easy Tree !?
112 Path-Sum Easy DFS ?
113 Path-Sum-2 Java Medium DFS ?
115 Distinct-subsequences Hard
120 Triangle Java Medium !
121 Best-Time-To-Buy-And-Sell-Stock Java Easy DP !
122 Best-Time-To-Buy-And-Sell-Stock-ii Java Easy DP、Greedy !?
123 Best-Time-To-Buy-And-Sell-Stock-iii Hard
125 Valid Palindrome Java Easy !
126 Word-Ladder-ii Java Hard ?
127 Word-Ladder Java Hard ??
128 Longest-Consecutive-Sequence Java Hard HashMap ?
130 Surrounded-Regions Java Medium Disjoint Sets ?
138 Copy List with Random Pointer Java Medium ?
141 Linked List Cycle Java Easy !!
142 Linked List Cycle II Java Medium !?
144 Binary Tree Preorder Traversal Java Medium !
145 Binary Tree Postorder Traversal Java Medium !
146 LRU Cache Java Medium !?
151 Reverse-Words-In-A-String Java Medium String ?
152 Maximum-Product-Subarray Java Medium !
153 Find-Minimum-In-Rotated-Sorted-Array Java Medium !
155 Min Stack Java Easy !
160 Intersection-Of-Two-Linked-Lists Java Easy !
169 Majority-Element Java Easy !
188 Best-Time-To-Buy-And-Sell-Stock-iv Hard
189 Rotate Array Java Medium !?
190 Reverse-Bits Java Easy Bitwise Operation ?
191 Number-Of-1-Bits Java Easy Bitwise Operation ?
198 House-Robber Java Medium !
200 Number Of Islands Java Medium !
230 Remove-Linked-List-Elements Easy List !
206 Reverse Linked List Java、Go Easy List !?!
208 Implement-Trie-Prefix-Tree Java Medium Trie ?
209 Minimum-Size-Subarray-Sum Java Medium Array ?
212 Word-Search-ii Hard Trie
213 House-Robber-ii Medium
217 Contains-Duplicate Java Easy HashMap !
221 Maximal Square Java Medium DP ?
225 Implement Stack using Queues Java Easy Stack !
226 Invert Binary Tree Java Easy Tree !?!
231 Power-Of-Two Java Easy Bitwise Operation ?
232 Implement Queue using Stacks Java Easy Stack !
234 Palindrome-Linked-List Java Easy !
236 Lowest Common Ancestor of a Binary Tree Java Medium Recursion !?
239 Sliding Window Maximum Java Hard !
240 Search-A-2d-Matrix-ii Java Medium Line search !
241 Different-Ways-To-Add-Parentheses Java Medium Divide & Conquer ?
242 Valid Anagram Java Easy !?
260 Single-Number-iii Java Medium Bitwise Operation ?
279 Perfect-Squares Medium
283 Move Zeroes Java、Go Easy Array ?!
297 Serialize and Deserialize Binary Tree Java Hard ?
300 Longest-Increasing-Subsequence Java Medium Binary Search ?
309 Best-Time-To-Buy-And-Sell-Stock-With-Cooldown Medium
312 Burst Balloons Hard
322 Coin-Change♥ Java Medium DP !
328 Odd-Even-Linked-List Java Medium ?
337 House-Robber-iii Java Medium Tree ?
338 Counting-Bits♥ Java Medium DP、Bitwise Operation ?
363 Max-Sum-Of-Rectangle-No-Larger-Than-K Hard
367 Valid-Perfect-Square Java Easy !
403 Frog Jump Java Hard DP ?
378 Kth-Smallest-Element-In-A-Sorted-Matrix/ Java Medium ?
383 Ransom-Note Java Easy String ?
404 Sum-Of-Left-Leaves Easy Tree !
410 Split Array Largest Sum Hard
429 N-Ary-Tree-Level-Order-Traversal Java Medium !
433 MinimumGeneticMutation Java Medium !
437 Path-Sum-iii Java Medium Tree ?
455 Assign-Cookies Java Easy !
485 Max-Consecutive-Ones Java Easy ?
493 Reverse-Pairs Hard
503 Next Greater Element II Java Medium ?
513 Find Bottom Left Tree Value Java Medium BFS ?
515 Find-Largest-Value-In-Each-Tree-Row Java Medium !
518 Coin Change 2 Java Medium DP ?
529 Minesweeper Java Medium !
535 Encode-And-Decode-Tinyurl Java Medium HashMap ?
543 Diameter-Of-Binary-Tree Easy Tree ??
552 Student-Attendance-Record-ii Hard
566 Reshape-The-Matrix Java Easy ?
572 Subtree-Of-Another-Tree Easy Tree
589 N-Ary-Tree-Preorder-Traversal Java Easy !
590 N-Ary-Tree-Postorder-Traversal Java Easy !
594 Longest-Harmonious-Subsequence Java Easy HashMap !
617 Merge Two Binary Trees Easy Tree ?
621 Task-Scheduler Medium
637 Average-Of-Levels-In-Binary-Tree Easy DFS/BFS ?
641 Design Circular Deque Java Medium !
647 Palindromic Substrings Java Medium Tree
671 Second Minimum Node In a Binary Tree Easy Tree ?
687 Longest Univalue Path Medium
704 Binary-Search Java Easy Binary Search !
707 Design-LinkedList Medium List
709 To-Lower-Case Java Easy String ?
712 Best-Time-To-Buy-And-Sell-Stock-With-Transaction-Fee Medium
725 Split-Linked-List-In-Parts Java Medium ?
739 DailyTemperatures Java Medium Stack ?
746 Min-Cost-Climbing-Stairs Easy
766 Toeplitz Matrix Java Easy ?
773 Sliding-Puzzle Hard
818 Race-Car Hard
860 Lemonade-Change Java Easy !
874 Walking-Robot-Simulation Java Easy !
980 Unique Paths III Java Hard DFS ?
1005 Maximize-Sum-Of-Array-After-K-Negations Java Easy Array ?
1034 Coloring-A-Border Java Medium DFS / BFS ?
1091 Shortest-Path-In-Binary-Matrix Medium
1122 Relative-Sort-Array Easy
1143 Longest-Common-Subsequence Java Medium ?
1277 Count-Square-Submatrices-With-All-Ones Java Medium DP ?

剑指Offer

No. Title Solution Difficulty Category Y&N
13 机器人的运动范围 Java Medium Recursion ?
26 树的子结构 Java Medium Recursion ??
36 二叉搜索树与双向链表 Medium
46 把数字翻译成字符串 Java Medium DP ?
51 数组中的逆序对 Java Hard Divide & Conquer ?
64 求1+2+…+n Java Medium Recursion ?

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