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leetcode's Introduction

LeetCode

Solutions and examples from my LeetCode profile

Objective

The purpose of this project is to provide some of my solutions to the various problems on the popular code challenge site, LeetCode. As I have studied various algorithims that are popular to solve these questions, I want to reiterate my thought process in order to feel more confident when I come up to similar problems in the future.

This is an ongoing project

Not all of my solutions are included here. The shield below tracks the running total of problems solved, and more will be added in the future.

LeetCode user jpal91


Tables


Python

Solution LC Link Screenshot
3Sum LC
Contains Duplicate LC
Contains Duplicate II LC
Course Schedule LC
Determine Whether Matrix Can be Obtained By Rotation LC Screenshot
Find First Palindromic String in the Array LC
Flip Game LC
Valid Anagram LC Screenshot
How Many Numbers Are Smaller Than the Current Number LC
Largest 3 Same Digit Number In String LC Screenshot
Maximum Depth of a N-Ary Tree LC Screenshot
Print Binary Tree LC Screenshot
Recover Binary Search Tree LC Screenshot
Top K Frequent Elements LC Screenshot
Two Sum LC
Univalued Binary Tree LC Screenshot
Valid Anagram LC
Zig-zag Conversion LC
Maximum Number of Balloons LC Screenshot
Merge Two Sorted Lists LC Screenshot
Remove Linked List Elements LC Screenshot
Valid Parentheses LC Screenshot
Merge Strings Alternately LC Screenshot
Find Leaves of Binary Tree LC
Employee Importance LC
Shortest Word Distance II LC Screenshot
Maximize Sum Of Array After K Negations LC
Time Needed to Buy Tickets LC
Minimum Amount of Time to Fill Cups LC
First Unique Character in a String LC
Reverse Linked List LC
Linked List Cycle LC
Valid Sudoku LC
Maximum Number of Balloons LC Screenshot
Meeting Rooms LC
Range Sum Query 2D - Immutable LC
Design File System LC
Design Front Middle Back Queue LC
Map Sum Pairs LC Screenshot
Design A Leaderboard LC Screenshot
Unique Word Abbreviation LC Screenshot
Merge k Sorted Lists LC Screenshot
Validate Binary Search Tree LC Screenshot
Same Tree LC Screenshot
Number of Islands LC
Remove All Adjacent Duplicates In String LC Screenshot

SQL

Solution LC Link Screenshot
Number of Accounts That Did Not Stream LC
Second Highest Salary LC
Number of Unique Subjects Taught by Each Teacher LC
Ad-Free Sessions LC
Primary Department for Each Employee LC
Product's Price for Each Store LC
Find Total Time Spent by Each Employee LC
The Number of Employees Which Report to Each Employee LC
Find Followers Count LC
Daily Leads and Partners LC
Product's Worth Over Invoices LC
Average Time of Process per Machine LC
Percentage of Users Attended a Contest LC
All Valid Triplets That Can Represent a Country LC
Sellers With No Sales LC
Market Analysis I LC

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