wonkwonlee / leetcode-python

LeetCode algorithm study with Python

LeetCode Problem with Python

Studying LeetCode problems with Python

Since 2021.03.20

Try to use Pythonic approaches.

Although I have studied algorithms and data structure since my undergraduate, I realize I have shallow experience in Python.

Most of my prior algorithmic study was focused on C and Java.

This project is to familiarize myself with fundamentals of algorithms and data structure and further to prepare the coding interview.

Algorithm and Data Structure

• ✅ Arrays 101

  • Max Consecutive Ones
  • Find Numbers with Even Number of Digits
  • Squares of a Sorted Array
  • Duplicate Zeros
  • Merge Sorted Array
  • Remove Element
  • Remove Duplicates from Sorted Array
  • Check If N and Its Double Exist
  • Valid Mountain Array
  • Replace Elements with Greatest Element on Right Side
  • Move Zeroes
  • Sort Array By Parity
  • Remove Element In-Place
  • Height Checker
  • Max Consecutive Ones II - Flip one 0
  • Third Maximum Number
  • Find All Numbers Disappeared in an Array
  • Squares of a Sorted Array - O(N) solution

• Linked List

  • Design Linked List - Singly Linked List
  • Linked List Cycle
  • Linked List Cycle II
  • Intersection of Two Linked Lists
  • Remove Nth Node From End of List
  • Reverse Linked List
  • Remove Linked List Elements
  • Odd Even Linked List
  • Palindrome Linked List
  • Design Linked List - Doubly Linked List
  • Merge Two Sorted Lists
  • Add Two Numbers
  • Flatten a Multilevel Doubly Linked List
  • Insert into a Cyclic Sorted List

• Binary Tree

• Recursion I

• Recursion II

• Array and String

• Queue and Stack

• Binary Search

• Binary Search Tree

• Trie

• Hash Table

Problems

#	Title	Difficulty
1	Two Sum	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
6	ZigZag Conversion	Medium
7	Reverse Integer	Easy
8	String to Integer (atoi)	Medium
9	Palindrome Number	Easy
10	Regular Expression Matching	Hard
11	Container With Most Water	Medium
12	Integer to Roman	Medium
13	Roman to Integer	Easy
14	Longest Common Prefix	Easy
15	3Sum	Medium
16	3Sum Closest	Medium
17	Letter Combinations of a Phone Number	Medium
18	4Sum	Medium
19	Remove Nth Node From End of List	Medium
20	Valid Parentheses	Easy
21	Merge Two Sorted Lists	Easy
26	Remove Duplicates from Sorted Array	Easy
27	Remove Element	Easy
695	Max Area of Island	Medium