Tags

Algorithm

• A1B2C3: Two Go Routine Print A1B2C3....Z26

Golang

• A1B2C3: Two Go Routine Print A1B2C3....Z26
• Intersection Of Two Sorted Arrays Using In Place Approach
• Search Graph In Golang
• Weighted Edit Distance
• 0072. Edit Distance

A1B2C3

• A1B2C3: Two Go Routine Print A1B2C3....Z26

Interview

• Find Target Last Index

Algorithms

• Find Target Last Index
• Intersection Of Two Sorted Arrays Using In Place Approach
• Search Graph In Golang

Go

• Find Target Last Index
• Bank Requests
• Binary Gap
• Cyclic Rotation
• NUM.LEETCODETITLE
• 0002.Add Two Numbers
• 0003.Longest Substring Without Repeating Characters
• 0005. Longest Palindromic Substring
• 0011.Container With Most Water
• 0015. 3Sum
• 0019. Remove Nth Node From End of List
• 0020. Valid Parentheses
• 0021. Merge Two Sorted Lists
• 0028. Find the Index of the First Occurrence in a String
• 33. Search in Rotated Sorted Array
• 0034. Find First and Last Position of Element in Sorted Array
• 0049.Group Anagrams
• 0053.Maximum Subarray
• 0070.Climbing Stairs
• 74. Search a 2D Matrix
• 0078. Subsets
• 100. Same Tree
• 0104.Maximum Depth of Binary Tree
• 105. Construct Binary Tree from Preorder and Inorder Traversal
• 110. Balanced Binary Tree
• 0121.Best Time to Buy and Sell Stock
• 0125. Valid Palindrome
• 128. Longest Consecutive Sequence
• 138. Copy List with Random Pointer
• 143. Reorder List
• 0153.Find-Minimum-in-Rotated-Sorted-Array
• 0167.Two Sum II Input Array Is Sorted
• 206. Reverse Linked List
• 0215. Kth Largest Element in an Array
• 0217.Contains-Duplicate
• 226. Invert Binary Tree
• 238. Product of Array Except Self
• 0242.Valid-Anagram
• 0283. Move Zeroes
• 0322.Coin Change
• 347. Top K Frequent Elements
• 380. Insert Delete GetRandom O(1)
• 381.Insert Delete GetRandom O(1) Duplicates allowed
• 412. Fizz Buzz
• 0543. Diameter of Binary Tree
• 0695.Max Area of Island
• 0703. Kth Largest Element in a Stream
• 0733.Flood Fill
• 746. Min Cost Climbing Stairs
• 875. Koko Eating Bananas
• 0981.Time Based Key-Value Store
• 1046. Last Stone Weight
• 1195. Fizz Buzz Multithreaded
• Golang Container Heap

Easy

• Find Target Last Index
• 0001.Two Sum
• 0020. Valid Parentheses
• 0027.Remove Element
• 0028. Find the Index of the First Occurrence in a String
• 0035.Search Insert Position
• 0070.Climbing Stairs
• 0088.Merge Sorted Array
• 100. Same Tree
• 0104.Maximum Depth of Binary Tree
• 110. Balanced Binary Tree
• 0121.Best Time to Buy and Sell Stock
• 0125. Valid Palindrome
• 0141.Linked List Cycle
• 0203.Remove Linked List Elements
• 206. Reverse Linked List
• 0217.Contains-Duplicate
• 226. Invert Binary Tree
• 0242.Valid-Anagram
• 0283. Move Zeroes
• 0344.Reverse String
• 0409. Longest Palindrome
• 412. Fizz Buzz
• 0509.Fibonacci Number
• 0543. Diameter of Binary Tree
• 0703. Kth Largest Element in a Stream
• 0704.Binary Search
• 0721.Accounts Merge
• 0733.Flood Fill
• 746. Min Cost Climbing Stairs
• 0876.Middle of the Linked List
• 1046. Last Stone Weight

Find Target Last Index

• Find Target Last Index

Right Bound

• Find Target Last Index

Left Bound

• Find Target Last Index

Intersection

• Intersection Of Two Sorted Arrays Using In Place Approach

Search Graph

• Search Graph In Golang

BFS

• Search Graph In Golang
• 226. Invert Binary Tree
• 0695.Max Area of Island
• 0733.Flood Fill

WeightedEditDistance

• Weighted Edit Distance

Dynamic Programming

• Weighted Edit Distance
• 0053.Maximum Subarray
• 0072. Edit Distance
• 0300.Longest Increasing Subsequence
• 0322.Coin Change
• 0354. Russian Doll Envelope
• 0509.Fibonacci Number
• 516. Longest Palindromic Subsequence
• 1143.Longest Common Subsequence

CodeSignal

• Bank Requests

Bank Requests

• Bank Requests

Codility

• Binary Gap
• Cyclic Rotation

Iterations

• Binary Gap

Painless

• Binary Gap
• Cyclic Rotation

Bitwise Manipulation

• Binary Gap

Array

• Cyclic Rotation
• 0003.Longest Substring Without Repeating Characters
• 0011.Container With Most Water
• 0015. 3Sum
• 0027.Remove Element
• 33. Search in Rotated Sorted Array
• 0034. Find First and Last Position of Element in Sorted Array
• 0035.Search Insert Position
• 0053.Maximum Subarray
• 0059.Spiral Matrix II
• 74. Search a 2D Matrix
• 0088.Merge Sorted Array
• 105. Construct Binary Tree from Preorder and Inorder Traversal
• 128. Longest Consecutive Sequence
• 0167.Two Sum II Input Array Is Sorted
• 0217.Contains-Duplicate
• 238. Product of Array Except Self
• 380. Insert Delete GetRandom O(1)
• 381.Insert Delete GetRandom O(1) Duplicates allowed
• 875. Koko Eating Bananas

Multiple Pointers

• Cyclic Rotation

LeetCode

• NUM.LEETCODETITLE
• 0002.Add Two Numbers
• 0003.Longest Substring Without Repeating Characters
• 0005. Longest Palindromic Substring
• 0011.Container With Most Water
• 0015. 3Sum
• 0019. Remove Nth Node From End of List
• 0020. Valid Parentheses
• 0021. Merge Two Sorted Lists
• 0028. Find the Index of the First Occurrence in a String
• 33. Search in Rotated Sorted Array
• 0034. Find First and Last Position of Element in Sorted Array
• 0049.Group Anagrams
• 0053.Maximum Subarray
• 0070.Climbing Stairs
• 74. Search a 2D Matrix
• 0078. Subsets
• 100. Same Tree
• 0104.Maximum Depth of Binary Tree
• 105. Construct Binary Tree from Preorder and Inorder Traversal
• 110. Balanced Binary Tree
• 0121.Best Time to Buy and Sell Stock
• 0125. Valid Palindrome
• 128. Longest Consecutive Sequence
• 138. Copy List with Random Pointer
• 143. Reorder List
• 0153.Find-Minimum-in-Rotated-Sorted-Array
• 0167.Two Sum II Input Array Is Sorted
• 206. Reverse Linked List
• 0215. Kth Largest Element in an Array
• 0217.Contains-Duplicate
• 226. Invert Binary Tree
• 238. Product of Array Except Self
• 0242.Valid-Anagram
• 0283. Move Zeroes
• 0322.Coin Change
• 347. Top K Frequent Elements
• 380. Insert Delete GetRandom O(1)
• 381.Insert Delete GetRandom O(1) Duplicates allowed
• 412. Fizz Buzz
• 0543. Diameter of Binary Tree
• 0695.Max Area of Island
• 0703. Kth Largest Element in a Stream
• 0733.Flood Fill
• 746. Min Cost Climbing Stairs
• 875. Koko Eating Bananas
• 0981.Time Based Key-Value Store
• 1046. Last Stone Weight
• 1195. Fizz Buzz Multithreaded

Easy/Medium/Hard

• NUM.LEETCODETITLE
• 0021. Merge Two Sorted Lists

LEETCODETITLE

• NUM.LEETCODETITLE
• 0104.Maximum Depth of Binary Tree
• 0153.Find-Minimum-in-Rotated-Sorted-Array

Medium

• 0002.Add Two Numbers
• 0003.Longest Substring Without Repeating Characters
• 0005. Longest Palindromic Substring
• 0011.Container With Most Water
• 0015. 3Sum
• 0019. Remove Nth Node From End of List
• 33. Search in Rotated Sorted Array
• 0034. Find First and Last Position of Element in Sorted Array
• 0046.Permutations
• 0049.Group Anagrams
• 0053.Maximum Subarray
• 0059.Spiral Matrix II
• 74. Search a 2D Matrix
• 0075.Sort Colors
• 0078. Subsets
• 0094.Binary Tree Inorder Traversal
• 105. Construct Binary Tree from Preorder and Inorder Traversal
• 128. Longest Consecutive Sequence
• 138. Copy List with Random Pointer
• 0142.Linked List Cycle II
• 0153.Find-Minimum-in-Rotated-Sorted-Array
• 0167.Two Sum II Input Array Is Sorted
• 0209. Minimum Size Subarray Sum
• 0215. Kth Largest Element in an Array
• 238. Product of Array Except Self
• 0300.Longest Increasing Subsequence
• 0310.Minimum Height Trees
• 0322.Coin Change
• 347. Top K Frequent Elements
• 380. Insert Delete GetRandom O(1)
• 0438.Find All Anagrams in a String
• 516. Longest Palindromic Subsequence
• 0567.Permutation in String
• 0693.Binary Number with Alternating Bits
• 0695.Max Area of Island
• 0752.Open the Lock
• 875. Koko Eating Bananas
• 0981.Time Based Key-Value Store
• 1143.Longest Common Subsequence
• 1195. Fizz Buzz Multithreaded

Add Two Numbers

• 0002.Add Two Numbers

Linked List

• 0002.Add Two Numbers
• 0019. Remove Nth Node From End of List
• 0141.Linked List Cycle
• 0142.Linked List Cycle II
• 143. Reorder List
• 0203.Remove Linked List Elements
• 0876.Middle of the Linked List

Math

• 0002.Add Two Numbers

Recursion

• 0002.Add Two Numbers
• 143. Reorder List

Amazon

• 0002.Add Two Numbers
• 0005. Longest Palindromic Substring
• 0011.Container With Most Water
• 0019. Remove Nth Node From End of List
• 33. Search in Rotated Sorted Array
• 74. Search a 2D Matrix
• 128. Longest Consecutive Sequence
• 138. Copy List with Random Pointer
• 143. Reorder List
• 0153.Find-Minimum-in-Rotated-Sorted-Array

Apple

• 0002.Add Two Numbers
• 33. Search in Rotated Sorted Array
• 412. Fizz Buzz

Facebook

• 0002.Add Two Numbers
• 0005. Longest Palindromic Substring
• 0011.Container With Most Water
• 0019. Remove Nth Node From End of List
• 33. Search in Rotated Sorted Array
• 74. Search a 2D Matrix
• 138. Copy List with Random Pointer
• 143. Reorder List
• 0153.Find-Minimum-in-Rotated-Sorted-Array
• 412. Fizz Buzz

Microsoft

• 0002.Add Two Numbers
• 0005. Longest Palindromic Substring
• 0011.Container With Most Water
• 0019. Remove Nth Node From End of List
• 33. Search in Rotated Sorted Array
• 74. Search a 2D Matrix
• 128. Longest Consecutive Sequence
• 138. Copy List with Random Pointer
• 143. Reorder List
• 0153.Find-Minimum-in-Rotated-Sorted-Array
• 412. Fizz Buzz

Bloomberg

• 0002.Add Two Numbers
• 0019. Remove Nth Node From End of List
• 74. Search a 2D Matrix
• 138. Copy List with Random Pointer
• 143. Reorder List

Longest Substring Without Repeating Characters

• 0003.Longest Substring Without Repeating Characters

Sliding Window

• 0003.Longest Substring Without Repeating Characters
• 0209. Minimum Size Subarray Sum
• 0438.Find All Anagrams in a String
• 0567.Permutation in String

Hash Table

• 0003.Longest Substring Without Repeating Characters
• 105. Construct Binary Tree from Preorder and Inorder Traversal
• 128. Longest Consecutive Sequence
• 0981.Time Based Key-Value Store

String

• 0003.Longest Substring Without Repeating Characters
• 0028. Find the Index of the First Occurrence in a String
• 0409. Longest Palindrome
• 0981.Time Based Key-Value Store

DP

• 0005. Longest Palindromic Substring
• 0070.Climbing Stairs
• 0121.Best Time to Buy and Sell Stock

Google

• 0005. Longest Palindromic Substring
• 0011.Container With Most Water
• 0019. Remove Nth Node From End of List
• 128. Longest Consecutive Sequence
• 138. Copy List with Random Pointer

Adobe

• 0005. Longest Palindromic Substring
• 0011.Container With Most Water
• 128. Longest Consecutive Sequence
• 143. Reorder List
• 0153.Find-Minimum-in-Rotated-Sorted-Array

Container With Most Water

• 0011.Container With Most Water

Two Pointers

• 0011.Container With Most Water
• 0015. 3Sum
• 0019. Remove Nth Node From End of List
• 0028. Find the Index of the First Occurrence in a String
• 0141.Linked List Cycle
• 0142.Linked List Cycle II
• 143. Reorder List
• 0167.Two Sum II Input Array Is Sorted
• 0344.Reverse String
• 0876.Middle of the Linked List

Greedy

• 0011.Container With Most Water

3Sum

• 0015. 3Sum

Sorting

• 0015. 3Sum
• 0215. Kth Largest Element in an Array

Valid Parentheses

• 0020. Valid Parentheses

Merge Two Sorted Lists

• 0021. Merge Two Sorted Lists

Find the Index of the First Occurrence in a String

• 0028. Find the Index of the First Occurrence in a String

String Matching

• 0028. Find the Index of the First Occurrence in a String

Binary Search

• 33. Search in Rotated Sorted Array
• 0034. Find First and Last Position of Element in Sorted Array
• 74. Search a 2D Matrix
• 0167.Two Sum II Input Array Is Sorted
• 0300.Longest Increasing Subsequence
• 0354. Russian Doll Envelope
• 0704.Binary Search
• 875. Koko Eating Bananas
• 0981.Time Based Key-Value Store

33. Search in Rotated Sorted Array

• 33. Search in Rotated Sorted Array

LinkedIn

• 33. Search in Rotated Sorted Array

Find First and Last Position of Element in Sorted Array

• 0034. Find First and Last Position of Element in Sorted Array

Backtracking

• 0046.Permutations

Group Anagrams

• 0049.Group Anagrams

Blind75

• 0053.Maximum Subarray
• 0121.Best Time to Buy and Sell Stock
• 0217.Contains-Duplicate
• 238. Product of Array Except Self

Climbing Stairs

• 0070.Climbing Stairs

Hard

• 0072. Edit Distance
• 0354. Russian Doll Envelope
• 381.Insert Delete GetRandom O(1) Duplicates allowed

Edit Distance

• 0072. Edit Distance

Search a 2D Matrix

• 74. Search a 2D Matrix

Matrix

• 74. Search a 2D Matrix
• 0695.Max Area of Island

Sort

• 0075.Sort Colors

Subsets

• 0078. Subsets

Stack

• 0094.Binary Tree Inorder Traversal
• 143. Reorder List

Same Tree

• 100. Same Tree

Tree

• 100. Same Tree
• 105. Construct Binary Tree from Preorder and Inorder Traversal

Construct Binary Tree from Preorder and Inorder Traversal

• 105. Construct Binary Tree from Preorder and Inorder Traversal

Divide and Conquer

• 105. Construct Binary Tree from Preorder and Inorder Traversal

Binary Tree

• 105. Construct Binary Tree from Preorder and Inorder Traversal

Balanced Binary Tree

• 110. Balanced Binary Tree

DFS

• 110. Balanced Binary Tree
• 0543. Diameter of Binary Tree
• 0695.Max Area of Island
• 0733.Flood Fill

Slide Windows

• 0121.Best Time to Buy and Sell Stock

Best Time to Buy and Sell Stock

• 0121.Best Time to Buy and Sell Stock

array

• 0121.Best Time to Buy and Sell Stock

amazon

• 0121.Best Time to Buy and Sell Stock

bloomberg

• 0121.Best Time to Buy and Sell Stock

facebook

• 0121.Best Time to Buy and Sell Stock

microsoft

• 0121.Best Time to Buy and Sell Stock

uber

• 0121.Best Time to Buy and Sell Stock

Valid Palindrome

• 0125. Valid Palindrome

Longest Consecutive Sequence

• 128. Longest Consecutive Sequence

Union Find

• 128. Longest Consecutive Sequence
• 0721.Accounts Merge

Spotify

• 128. Longest Consecutive Sequence

Copy List with Random Pointer

• 138. Copy List with Random Pointer

/Medium

• 143. Reorder List

143. Reorder List

• 143. Reorder List

Goldman Sachs

• 0153.Find-Minimum-in-Rotated-Sorted-Array

Two Sum II Input Array Is Sorted

• 0167.Two Sum II Input Array Is Sorted

Reverse Linked List

• 206. Reverse Linked List

Kth Largest Element in an Array

• 0215. Kth Largest Element in an Array

Heap

• 0215. Kth Largest Element in an Array
• 0703. Kth Largest Element in a Stream
• 1046. Last Stone Weight

Priority Queue

• 0215. Kth Largest Element in an Array
• 0703. Kth Largest Element in a Stream
• 1046. Last Stone Weight

Contains Duplicate

• 0217.Contains-Duplicate

Invert Binary Tree

• 226. Invert Binary Tree

Product of Array Except Self

• 238. Product of Array Except Self

Prefix Sum

• 238. Product of Array Except Self

Valid Anagram

• 0242.Valid-Anagram

Move Zeroes

• 0283. Move Zeroes

Patience Sorting

• 0300.Longest Increasing Subsequence

Breadth First Search

• 0310.Minimum Height Trees
• 0752.Open the Lock

Coin Change

• 0322.Coin Change

Top K Frequent Elements

• 347. Top K Frequent Elements

heap

• 347. Top K Frequent Elements

Insert Delete GetRandom O(1)

• 380. Insert Delete GetRandom O(1)

Hash

• 380. Insert Delete GetRandom O(1)
• 381.Insert Delete GetRandom O(1) Duplicates allowed

Insert Delete GetRandom O(1) Duplicates allowed

• 381.Insert Delete GetRandom O(1) Duplicates allowed

Fizz Buzz

• 412. Fizz Buzz

string

• 412. Fizz Buzz

math

• 412. Fizz Buzz

Diameter of Binary Tree

• 0543. Diameter of Binary Tree

Bit Manipulation

• 0693.Binary Number with Alternating Bits

Max Area of Island

• 0695.Max Area of Island

Array & String

• 0695.Max Area of Island

Kth Largest Element in a Stream

• 0703. Kth Largest Element in a Stream

Flood Fill

• 0733.Flood Fill

Min Cost Climbing Stairs

• 746. Min Cost Climbing Stairs

Koko Eating Bananas

• 875. Koko Eating Bananas

Time Based Key-Value Store

• 0981.Time Based Key-Value Store

Design

• 0981.Time Based Key-Value Store

Last Stone Weight

• 1046. Last Stone Weight

Fizz Buzz Multithreaded

• 1195. Fizz Buzz Multithreaded

Concurrency

• 1195. Fizz Buzz Multithreaded

container/heap

• Golang Container Heap