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Leetcode Solutions Series' Articles
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Solution: Next Permutation
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Feb 2 '21
Solution: Next Permutation
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3 min read
Solution: Trim a Binary Search Tree
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Feb 2 '21
Solution: Trim a Binary Search Tree
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3 min read
Leetcode Solutions Index
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Feb 2 '21
Leetcode Solutions Index
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11 min read
Solution: Minimize Deviation in Array
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Feb 2 '21
Solution: Minimize Deviation in Array
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4 min read
Solution: Vertical Order Traversal of a Binary Tree
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Feb 3 '21
Solution: Vertical Order Traversal of a Binary Tree
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4 min read
Solution: Count Ways to Make Array With Product
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Feb 3 '21
Solution: Count Ways to Make Array With Product
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5 min read
Solution: Smallest String With A Given Numeric Value
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Feb 3 '21
Solution: Smallest String With A Given Numeric Value
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3 min read
Solution: Linked List Cycle
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Feb 3 '21
Solution: Linked List Cycle
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3 min read
Solution: Path With Minimum Effort
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Feb 3 '21
Solution: Path With Minimum Effort
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4 min read
Solution: Concatenation of Consecutive Binary Numbers
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Feb 3 '21
Solution: Concatenation of Consecutive Binary Numbers
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2 min read
Solution: Minimum Operations to Make a Subsequence
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Feb 4 '21
Solution: Minimum Operations to Make a Subsequence
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3 min read
Solution: Longest Harmonious Subsequence
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Feb 4 '21
Solution: Longest Harmonious Subsequence
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2 min read
Solution: Simplify Path
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Feb 5 '21
Solution: Simplify Path
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3 min read
Solution: Building Boxes
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Feb 5 '21
Solution: Building Boxes
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3 min read
Solution: Decode XORed Permutation
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Feb 5 '21
Solution: Decode XORed Permutation
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3 min read
Solution: Binary Tree Right Side View
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Feb 6 '21
Solution: Binary Tree Right Side View
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2 min read
Solution: Find Kth Largest XOR Coordinate Value
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Feb 7 '21
Solution: Find Kth Largest XOR Coordinate Value
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5 min read
Solution: Change Minimum Characters to Satisfy One of Three Conditions
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Feb 7 '21
Solution: Change Minimum Characters to Satisfy One of Three Conditions
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5 min read
Solution: Shortest Distance to a Character
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Feb 7 '21
Solution: Shortest Distance to a Character
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3 min read
Solution: Peeking Iterator
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Feb 8 '21
Solution: Peeking Iterator
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3 min read
Solution: Convert BST to Greater Tree
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Feb 9 '21
Solution: Convert BST to Greater Tree
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2 min read
Solution: Copy List with Random Pointer
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Feb 10 '21
Solution: Copy List with Random Pointer
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3 min read
Solution: Valid Anagram
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Feb 11 '21
Solution: Valid Anagram
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2 min read
Solution: Number of Steps to Reduce a Number to Zero
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Feb 12 '21
Solution: Number of Steps to Reduce a Number to Zero
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2 min read
Solution: Shortest Path in Binary Matrix
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Feb 13 '21
Solution: Shortest Path in Binary Matrix
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5 min read
Solution: Is Graph Bipartite?
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Feb 14 '21
Solution: Is Graph Bipartite?
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4 min read
Solution: Maximum Score From Removing Substrings (ver. 1)
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Feb 14 '21
Solution: Maximum Score From Removing Substrings (ver. 1)
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4 min read
Solution: Maximum Score From Removing Substrings (ver. 2)
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Feb 14 '21
Solution: Maximum Score From Removing Substrings (ver. 2)
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4 min read
Solution: Sort the Matrix Diagonally
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Feb 15 '21
Solution: Sort the Matrix Diagonally
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4 min read
Solution: The K Weakest Rows in a Matrix (ver. 1)
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Feb 15 '21
Solution: The K Weakest Rows in a Matrix (ver. 1)
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4 min read
Solution: The K Weakest Rows in a Matrix (ver. 2)
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Feb 16 '21
Solution: The K Weakest Rows in a Matrix (ver. 2)
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5 min read
Solution: Letter Case Permutation
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Feb 16 '21
Solution: Letter Case Permutation
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3 min read
Solution: Container With Most Water
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Feb 17 '21
Solution: Container With Most Water
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4 min read
Solution: Arithmetic Slices
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Feb 18 '21
Solution: Arithmetic Slices
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4 min read
Solution: Minimum Remove to Make Valid Parentheses
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Feb 19 '21
Solution: Minimum Remove to Make Valid Parentheses
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4 min read
Solution: Roman to Integer
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Feb 20 '21
Solution: Roman to Integer
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4 min read
Solution: Broken Calculator
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Feb 21 '21
Solution: Broken Calculator
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4 min read
Solution: Find the Most Competitive Subsequence
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Feb 22 '21
Solution: Find the Most Competitive Subsequence
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3 min read
Solution: Longest Word in Dictionary through Deleting
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Feb 22 '21
Solution: Longest Word in Dictionary through Deleting
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3 min read
Solution: Search a 2D Matrix II
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Feb 23 '21
Solution: Search a 2D Matrix II
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3 min read
Solution: Score of Parentheses
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Feb 24 '21
Solution: Score of Parentheses
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3 min read
Solution: Shortest Unsorted Continuous Subarray
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Feb 25 '21
Solution: Shortest Unsorted Continuous Subarray
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4 min read
Solution: Validate Stack Sequences
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Feb 26 '21
Solution: Validate Stack Sequences
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3 min read
Solution: Divide Two Integers (ver. 1)
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Feb 27 '21
Solution: Divide Two Integers (ver. 1)
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4 min read
Solution: Divide Two Integers (ver. 2)
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Feb 27 '21
Solution: Divide Two Integers (ver. 2)
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3 min read
Solution: Maximum Frequency Stack
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Feb 28 '21
Solution: Maximum Frequency Stack
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4 min read
Solution: Distribute Candies
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Mar 1 '21
Solution: Distribute Candies
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3 min read
Solution: Set Mismatch (ver. 1)
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Mar 2 '21
Solution: Set Mismatch (ver. 1)
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3 min read
Solution: Set Mismatch (ver. 2)
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Mar 2 '21
Solution: Set Mismatch (ver. 2)
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3 min read
Solution: Missing Number
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Mar 3 '21
Solution: Missing Number
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2 min read
Solution: Intersection of Two Linked Lists
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Mar 4 '21
Solution: Intersection of Two Linked Lists
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4 min read
Solution: Average of Levels in Binary Tree
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Mar 5 '21
Solution: Average of Levels in Binary Tree
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3 min read
Solution: Short Encoding of Words (ver. 1)
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Mar 6 '21
Solution: Short Encoding of Words (ver. 1)
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4 min read
Solution: Design HashMap (ver. 1)
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Mar 7 '21
Solution: Design HashMap (ver. 1)
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3 min read
Solution: Short Encoding of Words (ver. 2)
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Mar 7 '21
Solution: Short Encoding of Words (ver. 2)
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5 min read
Solution: Design HashMap (ver. 2)
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Mar 8 '21
Solution: Design HashMap (ver. 2)
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6 min read
Solution: Remove Palindromic Subsequences
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Mar 8 '21
Solution: Remove Palindromic Subsequences
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3 min read
Solution: Add One Row to Tree
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Mar 9 '21
Solution: Add One Row to Tree
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4 min read
Solution: Integer to Roman
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Mar 10 '21
Solution: Integer to Roman
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3 min read
Solution: Coin Change
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Mar 11 '21
Solution: Coin Change
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4 min read
Solution: Check If a String Contains All Binary Codes of Size K
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Mar 12 '21
Solution: Check If a String Contains All Binary Codes of Size K
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4 min read
Solution: Binary Trees With Factors
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Mar 13 '21
Solution: Binary Trees With Factors
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4 min read
Solution: Swapping Nodes in a Linked List
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Mar 14 '21
Solution: Swapping Nodes in a Linked List
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3 min read
Solution: Encode and Decode TinyURL
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Mar 15 '21
Solution: Encode and Decode TinyURL
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3 min read
Solution: Best Time to Buy and Sell Stock with Transaction Fee
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Mar 16 '21
Solution: Best Time to Buy and Sell Stock with Transaction Fee
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4 min read
Solution: Generate Random Point in a Circle
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Mar 17 '21
Solution: Generate Random Point in a Circle
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4 min read
Solution: Wiggle Subsequence
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Mar 18 '21
Solution: Wiggle Subsequence
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3 min read
Solution: Keys and Rooms
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Mar 19 '21
Solution: Keys and Rooms
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3 min read
Solution: Design Underground System
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Mar 20 '21
Solution: Design Underground System
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5 min read
Solution: Reordered Power of 2
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Mar 21 '21
Solution: Reordered Power of 2
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3 min read
Solution: Vowel Spellchecker
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Mar 22 '21
Solution: Vowel Spellchecker
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5 min read
Solution: 3Sum With Multiplicity
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Mar 23 '21
Solution: 3Sum With Multiplicity
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6 min read
Solution: Advantage Shuffle
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Mar 24 '21
Solution: Advantage Shuffle
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4 min read
Solution: Pacific Atlantic Water Flow
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Mar 25 '21
Solution: Pacific Atlantic Water Flow
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5 min read
Solution: Word Subsets
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Mar 26 '21
Solution: Word Subsets
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5 min read
Solution: Palindromic Substrings
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Mar 27 '21
Solution: Palindromic Substrings
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3 min read
Solution: Reconstruct Original Digits from English
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Mar 28 '21
Solution: Reconstruct Original Digits from English
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4 min read
Solution: Flip Binary Tree To Match Preorder Traversal
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Mar 29 '21
Solution: Flip Binary Tree To Match Preorder Traversal
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4 min read
Solution: Russian Doll Envelopes
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Mar 30 '21
Solution: Russian Doll Envelopes
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4 min read
Solution: Stamping The Sequence
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Mar 31 '21
Solution: Stamping The Sequence
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5 min read
Solution: Palindrome Linked List
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Apr 1 '21
Solution: Palindrome Linked List
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4 min read
Solution: Ones and Zeroes
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Apr 2 '21
Solution: Ones and Zeroes
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4 min read
Solution: Longest Valid Parentheses
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Apr 3 '21
Solution: Longest Valid Parentheses
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4 min read
Solution: Design Circular Queue
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Apr 4 '21
Solution: Design Circular Queue
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7 min read
Solution: Global and Local Inversions
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Apr 5 '21
Solution: Global and Local Inversions
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3 min read
Solution: Minimum Operations to Make Array Equal
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Apr 6 '21
Solution: Minimum Operations to Make Array Equal
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4 min read
Solution: Determine if String Halves Are Alike
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Apr 7 '21
Solution: Determine if String Halves Are Alike
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3 min read
Solution: Letter Combinations of a Phone Number
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Apr 8 '21
Solution: Letter Combinations of a Phone Number
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4 min read
Solution: Verifying an Alien Dictionary
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Apr 9 '21
Solution: Verifying an Alien Dictionary
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4 min read
Solution: Longest Increasing Path in a Matrix
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Apr 10 '21
Solution: Longest Increasing Path in a Matrix
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4 min read
Solution: Deepest Leaves Sum
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Apr 11 '21
Solution: Deepest Leaves Sum
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4 min read
Solution: Beautiful Arrangement II
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Apr 12 '21
Solution: Beautiful Arrangement II
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4 min read
Solution: Flatten Nested List Iterator
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Apr 13 '21
Solution: Flatten Nested List Iterator
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3 min read
Solution: Partition List
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Apr 14 '21
Solution: Partition List
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3 min read
Solution: Fibonacci Number
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Apr 15 '21
Solution: Fibonacci Number
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3 min read
Solution: Remove All Adjacent Duplicates in String II
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Apr 16 '21
Solution: Remove All Adjacent Duplicates in String II
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6 min read
Solution: Number of Submatrices That Sum to Target
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Apr 17 '21
Solution: Number of Submatrices That Sum to Target
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4 min read
Solution: Remove Nth Node From End of List
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Apr 18 '21
Solution: Remove Nth Node From End of List
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4 min read
Solution: Combination Sum IV
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Apr 19 '21
Solution: Combination Sum IV
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5 min read
Solution: N-ary Tree Preorder Traversal
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Apr 20 '21
Solution: N-ary Tree Preorder Traversal
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3 min read
Solution: Triangle
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Apr 21 '21
Solution: Triangle
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4 min read
Solution: Brick Wall
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Apr 22 '21
Solution: Brick Wall
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4 min read
Solution: Count Binary Substrings
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Apr 23 '21
Solution: Count Binary Substrings
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3 min read
Solution: Critical Connections in a Network
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Apr 24 '21
Solution: Critical Connections in a Network
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5 min read
Solution: Rotate Image
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Apr 25 '21
Solution: Rotate Image
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4 min read
Solution: Furthest Building You Can Reach
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Apr 26 '21
Solution: Furthest Building You Can Reach
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5 min read
Solution: Power of Three
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Apr 27 '21
Solution: Power of Three
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3 min read
Solution: Unique Paths II
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Apr 28 '21
Solution: Unique Paths II
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4 min read
Solution: Find First and Last Position of Element in Sorted Array
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Apr 29 '21
Solution: Find First and Last Position of Element in Sorted Array
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4 min read
Solution: Powerful Integers
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Apr 30 '21
Solution: Powerful Integers
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3 min read
Solution: Prefix and Suffix Search
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May 1 '21
Solution: Prefix and Suffix Search
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21
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4
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5 min read
Solution: Course Schedule III
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May 2 '21
Solution: Course Schedule III
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4 min read
Solution: Running Sum of 1d Array
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May 3 '21
Solution: Running Sum of 1d Array
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3 min read
Solution: Non-decreasing Array
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May 4 '21
Solution: Non-decreasing Array
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4 min read
Solution: Jump Game II
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May 5 '21
Solution: Jump Game II
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3 min read
Solution: Convert Sorted List to Binary Search Tree
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May 6 '21
Solution: Convert Sorted List to Binary Search Tree
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4 min read
Solution: Delete Operation for Two Strings
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May 7 '21
Solution: Delete Operation for Two Strings
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4 min read
Solution: Super Palindromes
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May 8 '21
Solution: Super Palindromes
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7 min read
Solution: Construct Target Array With Multiple Sums
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May 9 '21
Solution: Construct Target Array With Multiple Sums
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5 min read
Solution: Count Primes
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May 10 '21
Solution: Count Primes
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3 min read
Solution: Maximum Points You Can Obtain from Cards
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May 11 '21
Solution: Maximum Points You Can Obtain from Cards
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3 min read
Solution: Range Sum Query 2D - Immutable
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May 12 '21
Solution: Range Sum Query 2D - Immutable
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5 min read
Solution: Ambiguous Coordinates
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May 13 '21
Solution: Ambiguous Coordinates
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5 min read
Solution: Flatten Binary Tree to Linked List
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May 14 '21
Solution: Flatten Binary Tree to Linked List
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23
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7 min read
Solution: Valid Number
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May 15 '21
Solution: Valid Number
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4 min read
Solution: Binary Tree Cameras
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May 16 '21
Solution: Binary Tree Cameras
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4 min read
Solution: Longest String Chain
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May 17 '21
Solution: Longest String Chain
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4 min read
Solution: Find Duplicate File in System
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May 18 '21
Solution: Find Duplicate File in System
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4 min read
Solution: Minimum Moves to Equal Array Elements II
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May 19 '21
Solution: Minimum Moves to Equal Array Elements II
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4
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3 min read
Solution: Binary Tree Level Order Traversal
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May 20 '21
Solution: Binary Tree Level Order Traversal
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3 min read
Solution: Find and Replace Pattern
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May 21 '21
Solution: Find and Replace Pattern
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4 min read
Solution: N-Queens
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May 22 '21
Solution: N-Queens
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4 min read
Solution: To Lower Case
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May 24 '21
Solution: To Lower Case
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4
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2 min read
Solution: Evaluate Reverse Polish Notation
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May 25 '21
Solution: Evaluate Reverse Polish Notation
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3 min read
Solution: Partitioning Into Minimum Number Of Deci-Binary Numbers
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May 26 '21
Solution: Partitioning Into Minimum Number Of Deci-Binary Numbers
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2 min read
Solution: Maximum Product of Word Lengths
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May 27 '21
Solution: Maximum Product of Word Lengths
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4 min read
Solution: Maximum Erasure Value
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May 28 '21
Solution: Maximum Erasure Value
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3 min read
Solution: N-Queens II
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May 29 '21
Solution: N-Queens II
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4 min read
Solution: Maximum Gap
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May 30 '21
Solution: Maximum Gap
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5 min read
Solution: Search Suggestions System
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May 31 '21
Solution: Search Suggestions System
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4 min read
Solution: Max Area of Island
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Jun 1 '21
Solution: Max Area of Island
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4 min read
Solution: Interleaving String
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Jun 3 '21
Solution: Interleaving String
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7
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4
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4 min read
Solution: Maximum Area of a Piece of Cake After Horizontal and Vertical Cuts
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Jun 3 '21
Solution: Maximum Area of a Piece of Cake After Horizontal and Vertical Cuts
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4 min read
Solution: Open the Lock
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Jun 4 '21
Solution: Open the Lock
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10
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5 min read
Solution: Maximum Performance of a Team
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Jun 5 '21
Solution: Maximum Performance of a Team
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2
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4 min read
Solution: Longest Consecutive Sequence
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Jun 6 '21
Solution: Longest Consecutive Sequence
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5 min read
Solution: Min Cost Climbing Stairs
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Jun 7 '21
Solution: Min Cost Climbing Stairs
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3 min read
Solution: Construct Binary Tree from Preorder and Inorder Traversal
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Jun 8 '21
Solution: Construct Binary Tree from Preorder and Inorder Traversal
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5 min read
Solution: Jump Game VI
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Jun 9 '21
Solution: Jump Game VI
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5 min read
Solution: My Calendar I
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Jun 10 '21
Solution: My Calendar I
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2
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6 min read
Solution: Stone Game VII
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Jun 11 '21
Solution: Stone Game VII
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4 min read
Solution: Minimum Number of Refueling Stops
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Jun 12 '21
Solution: Minimum Number of Refueling Stops
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5 min read
Solution: Palindrome Pairs
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Jun 13 '21
Solution: Palindrome Pairs
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6 min read
Solution: Maximum Units on a Truck
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Jun 14 '21
Solution: Maximum Units on a Truck
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3 min read
Solution: Matchsticks to Square
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Jun 16 '21
Solution: Matchsticks to Square
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6 min read
Solution: Generate Parentheses
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Jun 16 '21
Solution: Generate Parentheses
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3 min read
Solution: Number of Subarrays with Bounded Maximum
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Jun 17 '21
Solution: Number of Subarrays with Bounded Maximum
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3 min read
Solution: Swim in Rising Water
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Jun 20 '21
Solution: Swim in Rising Water
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2
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6 min read
Solution: Pascal's Triangle
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Jun 21 '21
Solution: Pascal's Triangle
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3 min read
Solution: Out of Boundary Paths
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Jun 24 '21
Solution: Out of Boundary Paths
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5 min read
Solution: Redundant Connection
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Jun 25 '21
Solution: Redundant Connection
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3
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3 min read
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