Name		Name	Last commit message	Last commit date
Latest commit History 224 Commits
Day of the Week		Day of the Week
Find Total Time Spent by Each Employee		Find Total Time Spent by Each Employee
Students With Invalid Departments		Students With Invalid Departments
A Number After a Double Reversal		A Number After a Double Reversal
Account Balance		Account Balance
Accounts Merge		Accounts Merge
Add Binary		Add Binary
Add Digits		Add Digits
Add One Row to Tree		Add One Row to Tree
Add Strings		Add Strings
Add Two Integers		Add Two Integers
Adding Spaces to a String		Adding Spaces to a String
All Elements in Two Binary Search Trees		All Elements in Two Binary Search Trees
Apples & Oranges		Apples & Oranges
Apply Discount Every n Orders		Apply Discount Every n Orders
Arranging Coins		Arranging Coins
Array Partition I		Array Partition I
Article Views I		Article Views I
Assign Cookies		Assign Cookies
Average Salary Excluding the Minimum and Maximum Salary		Average Salary Excluding the Minimum and Maximum Salary
Average Selling Price		Average Selling Price
Average Time of Process per Machine		Average Time of Process per Machine
Average of Levels in Binary Tree		Average of Levels in Binary Tree
Backspace String Compare		Backspace String Compare
Bank Account Summary II		Bank Account Summary II
Bank Account Summary		Bank Account Summary
Base 7		Base 7
Baseball Game		Baseball Game
Basic Calculator II		Basic Calculator II
Best Time to Buy and Sell Stock		Best Time to Buy and Sell Stock
Big Countries		Big Countries
Biggest Single Number		Biggest Single Number
Binary Number with Alternating Bits		Binary Number with Alternating Bits
Binary Search Tree Iterator		Binary Search Tree Iterator
Binary Tree Inorder Traversal		Binary Tree Inorder Traversal
Binary Tree Paths		Binary Tree Paths
Binary Tree Postorder Traversal		Binary Tree Postorder Traversal
Binary Tree Preorder Traversal		Binary Tree Preorder Traversal
Build Array from Permutation		Build Array from Permutation
Bulls and Cows		Bulls and Cows
Calculate Amount Paid in Taxes		Calculate Amount Paid in Taxes
Calculate Money in Leetcode Bank		Calculate Money in Leetcode Bank
Calculate Salaries		Calculate Salaries
Calculate Special Bonus		Calculate Special Bonus
Can Make Arithmetic Progression From Sequence		Can Make Arithmetic Progression From Sequence
Can Place Flowers		Can Place Flowers
Capitalize the Title		Capitalize the Title
Cells with Odd Values in a Matrix		Cells with Odd Values in a Matrix
Check If All 1's Are at Least Length K Places Away		Check If All 1's Are at Least Length K Places Away
Check If N and Its Double Exist		Check If N and Its Double Exist
Check If Two String Arrays are Equivalent		Check If Two String Arrays are Equivalent
Check If a Word Occurs As a Prefix of Any Word in a Sentence		Check If a Word Occurs As a Prefix of Any Word in a Sentence
Check Whether Two Strings are Almost Equivalent		Check Whether Two Strings are Almost Equivalent
Check if All A's Appears Before All B's		Check if All A's Appears Before All B's
Check if All Characters Have Equal Number of Occurrences		Check if All Characters Have Equal Number of Occurrences
Check if Binary String Has at Most One Segment of Ones		Check if Binary String Has at Most One Segment of Ones
Check if Number Has Equal Digit Count and Digit Value		Check if Number Has Equal Digit Count and Digit Value
Check if Numbers Are Ascending in a Sentence		Check if Numbers Are Ascending in a Sentence
Check if Word Equals Summation of Two Words		Check if Word Equals Summation of Two Words
Check if an Array Is Consecutive		Check if an Array Is Consecutive
Check if the Sentence Is Pangram		Check if the Sentence Is Pangram
Classes More Than 5 Students		Classes More Than 5 Students
Combine Two Tables		Combine Two Tables
Compare Strings by Frequency of the Smallest Character		Compare Strings by Frequency of the Smallest Character
Complement of Base 10 Integer		Complement of Base 10 Integer
Concatenation of Array		Concatenation of Array
Consecutive Available Seats		Consecutive Available Seats
Consecutive Characters		Consecutive Characters
Construct Binary Search Tree from Preorder Traversal		Construct Binary Search Tree from Preorder Traversal
Construct the Rectangle		Construct the Rectangle
Contains Duplicate II		Contains Duplicate II
Contains Duplicate		Contains Duplicate
Convert 1D Array Into 2D Array		Convert 1D Array Into 2D Array
Convert Binary Number in a Linked List to Integer		Convert Binary Number in a Linked List to Integer
Convert Integer to the Sum of Two No-Zero Integers		Convert Integer to the Sum of Two No-Zero Integers
Convert a Number to Hexadecimal		Convert a Number to Hexadecimal
Count Apples and Oranges		Count Apples and Oranges
Count Common Words With One Occurrence		Count Common Words With One Occurrence
Count Complete Tree Nodes		Count Complete Tree Nodes
Count Elements With Strictly Smaller and Greater Elements		Count Elements With Strictly Smaller and Greater Elements
Count Integers With Even Digit Sum		Count Integers With Even Digit Sum
Count Items Matching a Rule		Count Items Matching a Rule
Count Negative Numbers in a Sorted Matrix		Count Negative Numbers in a Sorted Matrix
Count Odd Numbers in an Interval Range		Count Odd Numbers in an Interval Range
Count Operations to Obtain Zero		Count Operations to Obtain Zero
Count Prefixes of a Given String		Count Prefixes of a Given String
Count Student Number in Departments		Count Student Number in Departments
Count of Matches in Tournament		Count of Matches in Tournament
Count the Number of Consistent Strings		Count the Number of Consistent Strings
Counting Elements		Counting Elements
Counting Words With a Given Prefix		Counting Words With a Given Prefix
Cousins in Binary Tree		Cousins in Binary Tree
Create Target Array in the Given Order		Create Target Array in the Given Order
Custom Sort String		Custom Sort String
Customer Who Visited but Did Not Make Any Transactions		Customer Who Visited but Did Not Make Any Transactions
Customers Who Never Order		Customers Who Never Order
DI String Match		DI String Match
Daily Leads and Partners		Daily Leads and Partners
Day of the Year		Day of the Year
Decode XORed Array		Decode XORed Array

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leetcode.com

Leetcode solutions

A collection of 390+ popular LeetCode problems that I've solved in Go and the rest is written in SQL, some of them definitely would deserve a refactoring session.

Each directory includes a solution to the problem and the directory name is the challenge name.

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