Leetcode

id	Problem	Java	Python	Hint	Difficulty
1	two sum	√	√	Hashmap	Easy
2	Add Two Numbers	√	√		Medium
3	Longest Substring Without Repeating Characters	√	√		Medium
4	Median of Two Sorted Arrays	√	√		Hard
5	Longest Palindromic Substring	√	√		Medium
8	String to Integer (atoi)	√	√		Medium
9	Palindrome Number	√	√		Easy
11	Container With Most Water	√	√		Medium
14	Longest Common Prefix	√	√		Easy
15	3Sum	√	√		Medium
20	Valid Parentheses	√	√		Medium
21	Merge Two Sorted Lists	√	√		Easy
22	Generate Parentheses	√	√		Medium
23	Merge k Sorted Lists	√	√		Hard
25	Reverse Nodes in k-Group	√	√		Hard
33	Search in Rotated Sorted Array	√	√		Medium
42	Trapping Rain Water	√	√		Hard
45	Jump Game II	√	√		Hard
46	Permutations	√	√		Medium
50	Pow(x, n)	√	√		Medium
53	Maximum Subarray	√	√		Easy
55	Jump Game	√	√		Medium
56	Merge Intervals	√	√		Medium
67	Add Binary	√	√		Easy
69	Sqrt(x)	√	√		Easy
70	Climbing Stairs	√	√		Easy
72	Edit Distance	√	√		Hard
76	Minimum Window Substring	√	√		Hard
84	Largest Rectangle in Histogram	√	√		Hard
88	Merge Sorted Array	√	√		Easy
98	Validate Binary Search Tree	√	√		Medium
101	Symmetric Tree	√	√		Easy
102	Binary Tree Level Order Traversal	√	√		Medium
105	Construct Binary Tree from Preorder and Inorder Traversal	√	√		Medium
108	Convert Sorted Array to Binary Search Tree	√			Easy
120	Triangle	√			Medium
125	Valid Palindrome	√	√		Easy
128	Longest Consecutive Sequence	√	√		Hard
136	Single Number	√	√		Easy
139	Word Break	√	√		Medium
146	LRU Cache	√	√		Medium
151	Reverse Words in a String	√	√		Medium
152	Maximum Product Subarray	√	√		Medium
155	Min Stack	√	√		Easy
169	Majority Element	√	√	Boyer-Moore Voting Algorithm	Easy
174	Dungeon Game	√			Hard
198	House Robber	√	√		Easy
199	Binary Tree Right Side View	√	√		Medium
200	Number of Islands	√	√		Hard
202	Happy Number	√	√		Easy
206	Reverse Linked List	√	√		Easy
210	Course Schedule II	√	√		Medium
221	Maximal Square	√	√		Medium
225	Implement Stack using Queues	√	√		Easy
229	Majority Element II	√	√		Medium
230	Kth Smallest Element in a BST	√	√		Medium
236	Lowest Common Ancestor of a Binary Tree	√	√		Medium
238	Product of Array Except Self	√	√		Medium
239	Sliding Window Maximum	√	√		Hard
242	Valid Anagram	√	√		Easy
250	Count Univalue Subtrees	√	√		Medium
287	Find the Duplicate Number	√	√		Medium
289	Game of Life	√	√		Medium
297	Serialize and Deserialize Binary Tree	√			Hard
322	Coin Change	√	√		Medium
355	Design Twitter	√	√		Medium
378	Kth Smallest Element in a Sorted Matrix	√			Medium
394	Decode String	√	√		Medium
445	Add Two Numbers II	√	√		Medium
460	LFU Cache	√			Hard
463	Island Perimeter	√	√		Easy
466	Count The Repetitions	√	√		Hard
516	Longest Palindromic Subsequence	√	√		Medium
542	01 Matrix	√	√	BFS	Medium
560	Subarray Sum Equals K	√	√		Medium
572	Subtree of Another Tree	√	√		Easy
680	Valid Palindrome II	√	√		Easy
695	Max Area of Island	√	√	DFS	Medium
733	Flood Fill	√	√	DFS	Easy
739	Daily Temperatures	√	√		Medium
820	Short Encoding of Words	√	√	Trie	Medium
837	New 21 Game	√	√		Medium
876	Middle of the Linked List	√	√		Easy
887	Super Egg Drop	√	√		Hard
892	Surface Area of 3D Shapes	√	√		Easy
912	Sort an Array	√	√	Counting Sort	Medium
914	X of a Kind in a Deck of Cards	√	√		Easy
974	Subarray Sums Divisible by K	√	√		Medium
983	Minimum Cost For Tickets	√	√		Medium
990	Satisfiability of Equality Equations	√	√		Medium
999	Available Captures for Rook	√	√		Easy
1013	Partition Array Into Three Parts With Equal Sum	√	√		Easy
1014	Best Sightseeing Pair	√			Medium
1028	Recover a Tree From Preorder Traversal	√			Hard
1034	Coloring A Border	√	√		Medium
1071	Greatest Common Divisor of Strings	√	√	Euclidean algorithm	Easy
1095	Find in Mountain Array	√	√		Hard
1111	Maximum Nesting Depth of Two Valid Parentheses Strings	√	√		Medium
1162	As Far from Land as Possible	√	√	BFS	Medium
1248	Count Number of Nice Subarrays	√	√		Medium
1313	Decompress Run-Length Encoded List	√	√		Easy
1342	Number of Steps to Reduce a Number to Zero	√	√	Bit Operation	Easy
1371	Find the Longest Substring Containing Vowels in Even Counts	√	√		Medium
1431 ｜ Kids With the Greatest Number of Candies	√	√		Easy

LCOF | 剑指offer

id	Problem	Java	Python	Hint	Difficulty
13	机器人的运动范围	√	√		Medium
17	printNumbers	√	√		Easy
29	顺时针打印矩阵	√	√		Easy
40	getLeastNumbers	√	√		Easy
46	把数字翻译成字符串	√	√		Medium
51	数组中的逆序对	√	√		Hard
56-I	数组中数字出现的次数	√	√		Medium
57-2	和为s的连续正数序列	√	√		Easy
62	圆圈中最后剩下的数字	√	√	Josephus problem	Easy
64	求1+2+…+n	√	√		Medium

LCCI | Cracking the Coding Interview

id	Problem	Java	Python	Hint	Difficulty
01.07	Rotate Matrix	√	√		Medium
08.06	Hanota	√	√		Easy
08.11	Coin LCCI	√	√		Medium
17.16	The Masseuse	√	√		Easy

LCF | python

id	Problem	Difficulty
07	传递信息	Easy
08	剧情触发时间	Medium
09	最小跳跃次数	Hard

weekly-contest-183 | python

id	Problem	Difficulty
5195	Longest Happy String	Medium
5376	Minimum Subsequence in Non-Increasing Order	Easy
5377	Number of Steps to Reduce a Number in Binary Representation to One	Medium
5379	Stone Game III	Hard

weekly-contest-184 | python

id	Problem	Difficulty
5380	String Matching in an Array	Easy
5381	Queries on a Permutation With Key	Medium
5382	HTML Entity Parser	Medium
5383	Number of Ways to Paint N × 3 Grid	Hard