Skip to content

/ play-with-leetcode

My Java and Python solutions for LeetCode problems. ( ^ _ ^ ) V

10 stars 2 forks
Star
Watch
master
1 branch 0 tags
Go to file
Code
Clone

Use Git or checkout with SVN using the web URL.

Latest commit

 

Git stats

Files

Permalink
Failed to load latest commit information.
Type
Name
Latest commit message
Commit time
docs
 
 
figs
 
 
notebooks
 
 
.gitignore
 
 
README.md
 
 
README_bak.md
 
 
README_bak2.md
 
 
leetcode.jpg
 
 

README.md

我的 LeetCode 刷题之旅

努力奋斗

前言

其实，自己一开始刷题的目的就想跟封面图一样——装个 B，但是刷着刷着确实发现刷题是有乐趣的，而且在未看答案的情况下能成功写出题解，确实会给自己带来一些成就感，因此也就坚持下来了。

为了更加方便地去管理自己刷过的题目，方便自己在下一次重刷的时候能够对上一次的题解进行优化，遂有了这个项目。

01. Array

# Title Difficulty Tags Note C++ Java Python
1 Two Sum Easy array,hash table [1], [2] solution
4 Median of Two Sorted Arrays Hard array,divide and conquer,binary search [1],[2],[3],[4]
11 Container With Most Water Medium array,two pointers [1],[2]
15 3Sum Medium array,hash table,two pointers [1],[2],[3]
16 3Sum Closest Medium array,two pointers [1]
26 Remove Duplicates From Sorted Array Easy array [1]
33 Search in Rotated Sorted Array Medium array,binary search [1]
46 Permutations Medium array,backtracking [1],[2]
47 Permutations II Medium array,backtracking [1]
54 Spiral Matrix Medium array [1],[2]
56 Merge Intevals Medium array [1]
59 Spiral Matrix II Medium array [1]
66 Plus One Easy array [1]
78 Subsets Medium array,backtracking,bit manipulation [1],[2],[3]
88 Merge Sorted Array Easy array,two pointers [1]
89 Gray Code Medium array [1]
90 Subsets II Medium array,backtracking [1]
136 Single Number Easy array,hash table,bit manipulation [1],[2],[3],[4]
153 Find Minimum in Rotated Sorted Array array,binary search [1]
167 Two Sum II - Input Array is Sorted Easy array,binary search,two pointers,hash table [1],[2],[3]
169 Majority Element Easy array,hash table,bit manipulation link [1],[2],[3]
215 Kth Largest Element in an Array Medium array,heap,divide and conquer [1],[2],[3],[4]
217 Contains Duplicate Easy array,hash table [1],[2],[3]
238 Product of Array Except Self Medium array [1],[2]
239 Sliding Window Maximum Hard array,heap,dp [1],[2],[3]
283 Move Zeros Easy array [1],[2],[3]
289 Game of Life Medium array [1],[2]
349 Intersection of Two Arrays Easy array link [1],[2],[3]
350 Intersection of Two Arrays II Easy array,hash table,two pointers link [1],[2]
525 Contiguous Array Medium array,hash table [1],[2]
560 Subarray Sum Equals K Medium array,hash table [1],[2],[3],[4]
695 Max Area of Island Medium array,dfs,bfs [1]
704 Binary Search Easy array,binary search [1]
724 Find Pivot Index Easy array [1]
744 Find Smallest Letter Greater Than Target Easy array,binary search [1],[2]
747 Largest Number at Least Twice of Others Easy array [1]
912 Sort an Array Medium array [1],[2],[3]
945 Minimum Increment to Make Array Uniques Medium array [1],[2],[3]
994 Rotting Oranges Easy array,bfs [1]
1013 Partition Array Into Three Parts With Equal Sum Easy array [1]
1160 Find Words That Can be Formed by Characters Easy array,hash table [1]
1162 As Far From Land as Possible Easy array,bfs,dfs [1]
1426 Counting Elements Easy array,hash table [1],[2]

02. String

# Title Difficulty Tags Note C++ Java Python
3 Longest Substring Without Repeating Characters Medium string,hash table,two pointers [1],[2],[3],[4]
8 String to Integer (atoi) Medium string,math [1],[2]
14 Longest Common Prefix Easy string,two pointers,binary search,divide and conquer [1],[2],[3]
20 Valid Parentheses Easy string,stack link [1]
22 Generate Parentheses Medium string,backtracking,bfs,dfs [1],[2],[3],[4]
43 Multiply Strings Medium string,math [1]
151 Reverse Words in a String Medium string,two pointers [1],[2],[3]
186 Reverse Words in a String II Medium string,two pointers [1]
344 Reverse String Easy string,two pointers [1]
409 Longest Palindrome Easy string,hash table [1]
557 Reverse Words in a String III Easy string [1],[2]
678 Valid Parenthesis String Medium string,dp,greedy [1],[2],[3]
844 Backspace String Compare Medium string,stack,two pointers [1],[2]
890 Find and Replace Pattern Medium string [1],[2],[3]
1111 Maximum Nesting Depth of Two Valid Parentheses Strings Medium string [1]
1427 Perform String Shifts Easy string [1]

03. Linked List

# Title Difficulty Tags Note C++ Java Python
2 Add Two Numbers Medium linked list link [1],[2]
19 Remove Nth Node From End of List Medium linked list [1]
21 Merge Two Sorted Lists Easy linked list link [1],[2]
23 Merge k Sorted Lists Hard linked list [1],[2],[3],[4],[5],[6]
24 Swap Nodes in Pairs Medium linked list [1],[2]
61 Rotate List Medium linked list [1]
141 Linked List Cycle Easy linked list link [1],[2]
142 Linked List Cycle II Medium linked list link [1],[2]
148 Sort List Medium linked list [1],[2]
160 Intersection of Two Linked List Easy linked list link [1],[2]
203 Remove Linked List Elements Easy linked list [1]
206 Reverse Linked List Easy linked list link [1],[2]
237 Delete Node in a Linked List Easy linked list link [1]
876 Middle of the Linked List Easy linked list [1]

04. Tree

# Title Difficulty Tags Note C++ Java Python
94 Binary Tree Inorder Traversal Medium tree,dfs link [1],[2],[3]
98 Validate Binary Search Tree Medium tree,dfs [1],[2],[3]
102 Binary Tree Level Order Traversal Medium tree,bfs,dfs [1],[2]
103 Binary Tree Zigzag Level Order Traversal Medium tree,bfs,dfs [1],[2]
104 Maximum Depth of Binary Tree Easy tree,bfs [1],[2],[3]
111 Minimum Depth of Binary Tree Easy tree,bfs [1],[2]
124 Binary Tree Maximum Path Sum Hard tree [1],[2]
144 Binary Tree Preorder Traversal Medium tree,dfs link [1],[2]
145 Binary Tree Postorder Traversal Hard tree,dfs [1],[2]
226 Invert Binary Tree Easy tree,bfs,dfs [1],[2],[3]
230 Kth Smallest Element in a BST Medium tree,bfs [1],[2]
235 Lowest Common Ancestor of a Binary Search Tree Easy tree [1],[2]
236 Lowest Common Ancestor of a Binary Tree Medium tree,dfs [1],[2],[3]
543 Diameter of Binary Tree Easy tree,dfs [1],[2]
1008 Construct Binary Search Tree From Preorder Traversal Medium tree [1],[2],[3]

05. Stack & Queue

# Title Difficulty Tags Note C++ Java Python
255 Implement Stack using Queues Easy stack,queue,design [1],[2],[3]
232 Implement Queue using Stacks Easy stack,queue,design [1],[2]
496 Next Greater Element I Easy stack,map [1],[2]
682 Baseball Game Easy stack [1]

06. Heap & Priority Queue

# Title Difficulty Tags Note C++ Java Python
347 Top K Frequent Elements Medium heap,hash table [1]
692 Top K Frequent Words Medium heap,hash table,trie [1],[2],[3],[4]
703 Kth Largest Element in a Stream Easy heap [1]
1046 Last Stone Weight Easy heap [1]

07. Math & Digit

# Title Difficulty Tags Note C++ Java Python
7 Reverse Integer Easy math link [1]
9 Palindrome Number Easy math link [1]
136 Single Number Easy math,bit manipulation link [1],[2],[3]
169 Majority Element Easy math,array link [1],[2],[3]
231 Power of Two Easy math,bit manipulation link [1],[2],[3]
365 Water And Jug Problem Medium math,bfs,dfs [1],[2],[3]
836 Rectangle Overlap Easy math [1],[2]
892 Surface Area of 3D Shapes Easy math [1]
1103 Distribute Candies to People Easy math [1],[2]

08. DP

# Title Difficulty Tags Note C++ Java Python
5 Longest Palindromic Substring Medium dp,string [1],[2],[3],[4],[5],[6]
53 Maximum Subarray Easy dp,array,divide and conquer [1],[2],[3],[4]
55 Jump Game Medium dp,array,greedy [1],[2],[3],[4]
70 Climbing Stairs Easy dp [1],[2],[3],[4],[5],[6]
72 Edit Distance Hard dp [1],[2]
120 Triangle Medium dp,array [1]
121 Best Time to Buy and Sell Stock Easy dp [1],[2]
122 Best Time to Buy and Sell Stock II Easy dp [1]
132 Palindrome Partitioning II Hard dp,string [1],[2],[3],[4]
300 (Length of) Longest Increaing Subsequence Medium dp,array,bianry search [1],[2],[3],[4],[5]
322 Coin Change Medium dp [1],[2],[3]
343 Integer Break Medium dp,math [1]
516 (Length) of Longest Palindromic Subsequence Medium dp,string [1],[2],[3],[4],[5]
887 Super Egg Drop Hard dp,math,binary search [1]
1143 Longest Common Subsequence Medium dp,string [1],[2],[3],[4]
1312 Minimum Insertion Steps to Make a String Palindromic Hard dp,string [1]

09. Design

# Title Difficulty Tags Note C++ Java Python
146 LRU Cache Medium design [1],[2]
155 Min Stack Easy design,stack [1],[2]
460 LFU Cache Hard design [1]
1429 First Unique Number Medium design [1]

10. Others

# Title Difficulty Tags Note C++ Java Python
412 Fizz Buzz Easy [1],[2],[3]

About

My Java and Python solutions for LeetCode problems. ( ^ _ ^ ) V

Topics

leetcode-solutions data-structures-and-algorithms data-structures algorithms leetcode-java leetcode-python leetcode

Resources

Readme

Releases

No releases published

Packages

No packages published
You can’t perform that action at this time.