Leetcode Reference Index

2021-05-04 | 2021-05-08 | 2021-05-13 | 2021-06-21 | 2021-07-05 | 2021-07-06 | 2021-07-07 | 2021-07-08 | 2021-07-09 | 2021-07-12 | 2021-07-13 | 2021-07-15 | 2021-07-16 | 2021-07-17 | 2021-07-19 | 2021-07-20 | 2021-07-22 | 2021-07-28 | 2024-04-01 | 2026-03-05 | 2026-03-16 | 2026-03-22 | 2026-03-23 | 2026-03-27 | 2026-03-29 | 2026-03-30 | 3Sum | 3sum | Add Two Numbers | Balance A Binary Search Tree | Balanced Binary Tree | Best Time to Buy and Sell Stock | Best Time to Buy and Sell Stock II | Best Time to Buy and Sell Stock III | Binary Tree Inorder Traversal | Climbing Stairs | Combination Sum | Combination Sum II | Convert Sorted Array To Binary Search Tree | Diameter Of Binary Tree | Easy | Edit Distance | Evaluate Reverse Polish Notation | Generate Parentheses | Hard | House Robber | Implement Trie Prefix Tree | Invert Binary Tree | Jump Game | Jump Game II | Kth Smallest Element In A Bst | LFU Cache | LRU Cache | Linked List Cycle | Linked List Cycle II | Longest Common Subsequence | Longest Increasing Subsequence | Longest Palindromic Subsequence | Longest Palindromic Substring | Majority Element | Maximum Depth Of Binary Tree | Maximum Product Subarray | Maximum Subarray | Medium | Merge Sorted Array | Merge Two Binary Trees | Merge Two Sorted Lists | Minimum ASCII Delete Sum for Two Strings | Minimum Absolute Difference In Bst | Next Greater Element I | Ones and Zeroes | Partition Equal Subset Sum | Product of Array Except Self | Remove Duplicates From Sorted Array | Remove Duplicates From Sorted Array II | Remove Element | Reverse Linked List | Reverse Linked List II | Reverse Nodes In K Group | Rotate Array | Search A 2D Matrix | Search Insert Position | Shortest Subarray To Be Removed To Make Array Sorted | Single Number | Sort an Array | Swap Nodes in Pairs | Symmetric Tree | Tire树 | Trapping Rain Water | Two Sum | Valid Parentheses | Validate Binary Search Tree | add-two-numbers | balance-a-binary-search-tree | balanced-binary-tree | best-time-to-buy-and-sell-stock | best-time-to-buy-and-sell-stock-ii | best-time-to-buy-and-sell-stock-iii | binary-tree-inorder-traversal | climbing-stairs | combination-sum | combination-sum-ii | convert-sorted-array-to-binary-search-tree | diameter-of-binary-tree | edit-distance | evaluate-reverse-polish-notation | generate-parentheses | go | house-robber | implement-trie-prefix-tree | invert-binary-tree | jump-game | jump-game-ii | kth-smallest-element-in-a-bst | lfu-cache | linked-list-cycle | linked-list-cycle-ii | longest-common-subsequence | longest-increasing-subsequence | longest-palindromic-subsequence | longest-palindromic-substring | lru-cache | majority-element | maximum-depth-of-binary-tree | maximum-product-subarray | maximum-subarray | merge-sorted-array | merge-two-binary-trees | merge-two-sorted-lists | minimum-absolute-difference-in-bst | minimum-ascii-delete-sum-for-two-strings | next-greater-element-i | ones-and-zeroes | partition-equal-subset-sum | product-of-array-except-self | remove-duplicates-from-sorted-array | remove-duplicates-from-sorted-array-ii | remove-element | reverse-linked-list | reverse-linked-list-ii | reverse-nodes-in-k-group | rotate-array | rust | search-a-2d-matrix | search-insert-position | shortest-subarray-to-be-removed-to-make-array-sorted | single-number | sort-an-array | swap-nodes-in-pairs | symmetric-tree | trapping-rain-water | two-sum | valid-parentheses | validate-binary-search-tree | 二分查找 | 二分法 | 二叉搜索树 | 二叉树 | 位操作 | 分治法 | 前缀数组 | 动态规划 | 单调栈 | 双指针 | 回溯 | 平衡二叉树 | 快慢指针 | 排序 | 搜索 | 数组 | 贪心 | 递归 | 链表


	2021-05-04
	`Valid Parentheses`

	2021-05-08
	`LRU Cache`
	`LFU Cache`

	2021-05-13
	`Add Two Numbers`

	2021-06-21
	`Partition Equal Subset Sum`

	2021-07-05
	`Maximum Subarray`
	`Merge Two Sorted Lists`

	2021-07-06
	`Climbing Stairs`
	`Maximum Subarray`
	`Binary Tree Inorder Traversal`
	`Symmetric Tree`

	2021-07-07
	`Best Time to Buy and Sell Stock`
	`Single Number`
	`Best Time to Buy and Sell Stock II`
	`Best Time to Buy and Sell Stock III`
	`Maximum Depth Of Binary Tree`
	`Invert Binary Tree`

	2021-07-08
	`Diameter Of Binary Tree`

	2021-07-09
	`Shortest Subarray To Be Removed To Make Array Sorted`
	`Maximum Product Subarray`
	`Merge Two Binary Trees`
	`House Robber`

	2021-07-12
	`Minimum ASCII Delete Sum for Two Strings`
	`Longest Increasing Subsequence`
	`Edit Distance`

	2021-07-13
	`Linked List Cycle`
	`Longest Palindromic Substring`
	`Longest Common Subsequence`
	`Longest Palindromic Subsequence`

	2021-07-15
	`Linked List Cycle II`
	`Trapping Rain Water`
	`Product of Array Except Self`

	2021-07-16
	`Implement Trie Prefix Tree`
	`Reverse Linked List`
	`Next Greater Element I`
	`Reverse Linked List II`
	`Swap Nodes in Pairs`

	2021-07-17
	`Generate Parentheses`
	`Combination Sum`

	2021-07-19
	`3Sum`
	`Combination Sum II`
	`Reverse Nodes In K Group`
	`Sort an Array`

	2021-07-20
	`Convert Sorted Array To Binary Search Tree`
	`Balance A Binary Search Tree`
	`Balanced Binary Tree`
	`Evaluate Reverse Polish Notation`

	2021-07-22
	`LFU Cache`

	2021-07-28
	`Ones and Zeroes`
	`Best Time to Buy and Sell Stock III`

	2024-04-01
	`Partition Equal Subset Sum`

	2026-03-05
	`Merge Sorted Array`

	2026-03-16
	`LFU Cache`
	`Sort an Array`

	2026-03-22
	`Linked List Cycle`
	`Partition Equal Subset Sum`
	`Linked List Cycle II`

	2026-03-23
	`Reverse Linked List`
	`Invert Binary Tree`

	2026-03-27
	`Remove Element`
	`Majority Element`
	`Remove Duplicates From Sorted Array`
	`Remove Duplicates From Sorted Array II`
	`Rotate Array`

	2026-03-29
	`Best Time to Buy and Sell Stock`
	`Best Time to Buy and Sell Stock II`
	`Jump Game`
	`Jump Game II`

	2026-03-30
	`Search A 2D Matrix`
	`Validate Binary Search Tree`
	`Minimum Absolute Difference In Bst`
	`Search Insert Position`
	`Kth Smallest Element In A Bst`

	3Sum
	`3Sum`

	3sum
	`3Sum`

	Add Two Numbers
	`Add Two Numbers`

	Balance A Binary Search Tree
	`Balance A Binary Search Tree`

	Balanced Binary Tree
	`Balanced Binary Tree`

	Best Time to Buy and Sell Stock
	`Best Time to Buy and Sell Stock`

	Best Time to Buy and Sell Stock II
	`Best Time to Buy and Sell Stock II`

	Best Time to Buy and Sell Stock III
	`Best Time to Buy and Sell Stock III`

	Binary Tree Inorder Traversal
	`Binary Tree Inorder Traversal`

	Climbing Stairs
	`Climbing Stairs`

	Combination Sum
	`Combination Sum`

	Combination Sum II
	`Combination Sum II`

	Convert Sorted Array To Binary Search Tree
	`Convert Sorted Array To Binary Search Tree`

	Diameter Of Binary Tree
	`Diameter Of Binary Tree`

	Easy
	`Remove Element`
	`Diameter Of Binary Tree`
	`Symmetric Tree`
	`Maximum Depth Of Binary Tree`
	`Binary Tree Inorder Traversal`
	`Merge Sorted Array`
	`Balanced Binary Tree`
	`Invert Binary Tree`
	`Maximum Subarray`
	`Minimum Absolute Difference In Bst`
	`Remove Duplicates From Sorted Array`
	`Next Greater Element I`
	`Climbing Stairs`
	`Convert Sorted Array To Binary Search Tree`
	`Jump Game`
	`Single Number`
	`Best Time to Buy and Sell Stock`
	`Majority Element`
	`Valid Parentheses`
	`Search Insert Position`
	`Merge Two Binary Trees`
	`Merge Two Sorted Lists`
	`Reverse Linked List`
	`Linked List Cycle`
	`Two Sum`

	Edit Distance
	`Edit Distance`

	Evaluate Reverse Polish Notation
	`Evaluate Reverse Polish Notation`

	Generate Parentheses
	`Generate Parentheses`

	Hard
	`Edit Distance`
	`Trapping Rain Water`
	`Best Time to Buy and Sell Stock III`
	`Reverse Nodes In K Group`

	House Robber
	`House Robber`

	Implement Trie Prefix Tree
	`Implement Trie Prefix Tree`

	Invert Binary Tree
	`Invert Binary Tree`

	Jump Game
	`Jump Game`

	Jump Game II
	`Jump Game II`

	Kth Smallest Element In A Bst
	`Kth Smallest Element In A Bst`

	LFU Cache
	`LFU Cache`

	LRU Cache
	`LRU Cache`

	Linked List Cycle
	`Linked List Cycle`

	Linked List Cycle II
	`Linked List Cycle II`

	Longest Common Subsequence
	`Longest Common Subsequence`

	Longest Increasing Subsequence
	`Longest Increasing Subsequence`

	Longest Palindromic Subsequence
	`Longest Palindromic Subsequence`

	Longest Palindromic Substring
	`Longest Palindromic Substring`

	Majority Element
	`Majority Element`

	Maximum Depth Of Binary Tree
	`Maximum Depth Of Binary Tree`

	Maximum Product Subarray
	`Maximum Product Subarray`

	Maximum Subarray
	`Maximum Subarray`

	Medium
	`LFU Cache`
	`Remove Duplicates From Sorted Array II`
	`House Robber`
	`Rotate Array`
	`Shortest Subarray To Be Removed To Make Array Sorted`
	`Longest Palindromic Subsequence`
	`Longest Palindromic Substring`
	`Search A 2D Matrix`
	`Maximum Product Subarray`
	`Evaluate Reverse Polish Notation`
	`Longest Common Subsequence`
	`Longest Increasing Subsequence`
	`Add Two Numbers`
	`Generate Parentheses`
	`Kth Smallest Element In A Bst`
	`LRU Cache`
	`Balance A Binary Search Tree`
	`Sort an Array`
	`Linked List Cycle II`
	`3Sum`
	`Combination Sum II`
	`Implement Trie Prefix Tree`
	`Combination Sum`
	`Validate Binary Search Tree`
	`Reverse Linked List II`
	`Partition Equal Subset Sum`
	`Jump Game II`
	`Best Time to Buy and Sell Stock II`
	`Minimum ASCII Delete Sum for Two Strings`
	`Product of Array Except Self`
	`Ones and Zeroes`
	`Swap Nodes in Pairs`

	Merge Sorted Array
	`Merge Sorted Array`

	Merge Two Binary Trees
	`Merge Two Binary Trees`

	Merge Two Sorted Lists
	`Merge Two Sorted Lists`

	Minimum ASCII Delete Sum for Two Strings
	`Minimum ASCII Delete Sum for Two Strings`

	Minimum Absolute Difference In Bst
	`Minimum Absolute Difference In Bst`

	Next Greater Element I
	`Next Greater Element I`

	Ones and Zeroes
	`Ones and Zeroes`

	Partition Equal Subset Sum
	`Partition Equal Subset Sum`

	Product of Array Except Self
	`Product of Array Except Self`

	Remove Duplicates From Sorted Array
	`Remove Duplicates From Sorted Array`

	Remove Duplicates From Sorted Array II
	`Remove Duplicates From Sorted Array II`

	Remove Element
	`Remove Element`

	Reverse Linked List
	`Reverse Linked List`

	Reverse Linked List II
	`Reverse Linked List II`

	Reverse Nodes In K Group
	`Reverse Nodes In K Group`

	Rotate Array
	`Rotate Array`

	Search A 2D Matrix
	`Search A 2D Matrix`

	Search Insert Position
	`Search Insert Position`

	Shortest Subarray To Be Removed To Make Array Sorted
	`Shortest Subarray To Be Removed To Make Array Sorted`

	Single Number
	`Single Number`

	Sort an Array
	`Sort an Array`

	Swap Nodes in Pairs
	`Swap Nodes in Pairs`

	Symmetric Tree
	`Symmetric Tree`

	Tire树
	`Implement Trie Prefix Tree`

	Trapping Rain Water
	`Trapping Rain Water`

	Two Sum
	`Two Sum`

	Valid Parentheses
	`Valid Parentheses`

	Validate Binary Search Tree
	`Validate Binary Search Tree`

	add-two-numbers
	`Add Two Numbers`

	balance-a-binary-search-tree
	`Balance A Binary Search Tree`

	balanced-binary-tree
	`Balanced Binary Tree`

	best-time-to-buy-and-sell-stock
	`Best Time to Buy and Sell Stock`

	best-time-to-buy-and-sell-stock-ii
	`Best Time to Buy and Sell Stock II`

	best-time-to-buy-and-sell-stock-iii
	`Best Time to Buy and Sell Stock III`

	binary-tree-inorder-traversal
	`Binary Tree Inorder Traversal`

	climbing-stairs
	`Climbing Stairs`

	combination-sum
	`Combination Sum`

	combination-sum-ii
	`Combination Sum II`

	convert-sorted-array-to-binary-search-tree
	`Convert Sorted Array To Binary Search Tree`

	diameter-of-binary-tree
	`Diameter Of Binary Tree`

	edit-distance
	`Edit Distance`

	evaluate-reverse-polish-notation
	`Evaluate Reverse Polish Notation`

	generate-parentheses
	`Generate Parentheses`

	go
	`LFU Cache`
	`Maximum Depth Of Binary Tree`
	`Remove Duplicates From Sorted Array II`
	`Balanced Binary Tree`
	`Rotate Array`
	`Maximum Subarray`
	`Convert Sorted Array To Binary Search Tree`
	`Jump Game`
	`Search A 2D Matrix`
	`Merge Two Binary Trees`
	`Reverse Nodes In K Group`
	`Merge Two Sorted Lists`
	`Linked List Cycle`
	`Add Two Numbers`
	`Kth Smallest Element In A Bst`
	`Diameter Of Binary Tree`
	`Remove Element`
	`Balance A Binary Search Tree`
	`LRU Cache`
	`Symmetric Tree`
	`Linked List Cycle II`
	`Binary Tree Inorder Traversal`
	`Merge Sorted Array`
	`Invert Binary Tree`
	`Implement Trie Prefix Tree`
	`Remove Duplicates From Sorted Array`
	`Climbing Stairs`
	`Majority Element`
	`Validate Binary Search Tree`
	`Reverse Linked List II`
	`Search Insert Position`
	`Jump Game II`
	`Reverse Linked List`
	`Minimum Absolute Difference In Bst`
	`Ones and Zeroes`
	`Swap Nodes in Pairs`

	house-robber
	`House Robber`

	implement-trie-prefix-tree
	`Implement Trie Prefix Tree`

	invert-binary-tree
	`Invert Binary Tree`

	jump-game
	`Jump Game`

	jump-game-ii
	`Jump Game II`

	kth-smallest-element-in-a-bst
	`Kth Smallest Element In A Bst`

	lfu-cache
	`LFU Cache`

	linked-list-cycle
	`Linked List Cycle`

	linked-list-cycle-ii
	`Linked List Cycle II`

	longest-common-subsequence
	`Longest Common Subsequence`

	longest-increasing-subsequence
	`Longest Increasing Subsequence`

	longest-palindromic-subsequence
	`Longest Palindromic Subsequence`

	longest-palindromic-substring
	`Longest Palindromic Substring`

	lru-cache
	`LRU Cache`

	majority-element
	`Majority Element`

	maximum-depth-of-binary-tree
	`Maximum Depth Of Binary Tree`

	maximum-product-subarray
	`Maximum Product Subarray`

	maximum-subarray
	`Maximum Subarray`

	merge-sorted-array
	`Merge Sorted Array`

	merge-two-binary-trees
	`Merge Two Binary Trees`

	merge-two-sorted-lists
	`Merge Two Sorted Lists`

	minimum-absolute-difference-in-bst
	`Minimum Absolute Difference In Bst`

	minimum-ascii-delete-sum-for-two-strings
	`Minimum ASCII Delete Sum for Two Strings`

	next-greater-element-i
	`Next Greater Element I`

	ones-and-zeroes
	`Ones and Zeroes`

	partition-equal-subset-sum
	`Partition Equal Subset Sum`

	product-of-array-except-self
	`Product of Array Except Self`

	remove-duplicates-from-sorted-array
	`Remove Duplicates From Sorted Array`

	remove-duplicates-from-sorted-array-ii
	`Remove Duplicates From Sorted Array II`

	remove-element
	`Remove Element`

	reverse-linked-list
	`Reverse Linked List`

	reverse-linked-list-ii
	`Reverse Linked List II`

	reverse-nodes-in-k-group
	`Reverse Nodes In K Group`

	rotate-array
	`Rotate Array`

	rust
	`Sort an Array`
	`3Sum`
	`House Robber`
	`Combination Sum II`
	`Shortest Subarray To Be Removed To Make Array Sorted`
	`Longest Palindromic Subsequence`
	`Next Greater Element I`
	`Combination Sum`
	`Best Time to Buy and Sell Stock III`
	`Longest Palindromic Substring`
	`Single Number`
	`Best Time to Buy and Sell Stock`
	`Maximum Product Subarray`
	`Edit Distance`
	`Evaluate Reverse Polish Notation`
	`Valid Parentheses`
	`Partition Equal Subset Sum`
	`Longest Common Subsequence`
	`Trapping Rain Water`
	`Longest Increasing Subsequence`
	`Best Time to Buy and Sell Stock II`
	`Minimum ASCII Delete Sum for Two Strings`
	`Two Sum`
	`Generate Parentheses`

	search-a-2d-matrix
	`Search A 2D Matrix`

	search-insert-position
	`Search Insert Position`

	shortest-subarray-to-be-removed-to-make-array-sorted
	`Shortest Subarray To Be Removed To Make Array Sorted`

	single-number
	`Single Number`

	sort-an-array
	`Sort an Array`

	swap-nodes-in-pairs
	`Swap Nodes in Pairs`

	symmetric-tree
	`Symmetric Tree`

	trapping-rain-water
	`Trapping Rain Water`

	two-sum
	`Two Sum`

	valid-parentheses
	`Valid Parentheses`

	validate-binary-search-tree
	`Validate Binary Search Tree`

	二分查找
	`Search Insert Position`
	`Search A 2D Matrix`

	二分法
	`Longest Increasing Subsequence`

	二叉搜索树
	`Minimum Absolute Difference In Bst`
	`Convert Sorted Array To Binary Search Tree`
	`Kth Smallest Element In A Bst`
	`Validate Binary Search Tree`

	二叉树
	`Diameter Of Binary Tree`
	`Balance A Binary Search Tree`
	`Symmetric Tree`
	`Binary Tree Inorder Traversal`
	`Maximum Depth Of Binary Tree`
	`Balanced Binary Tree`
	`Merge Two Binary Trees`
	`Invert Binary Tree`
	`Convert Sorted Array To Binary Search Tree`

	位操作
	`Single Number`

	分治法
	`Maximum Subarray`

	前缀数组
	`Product of Array Except Self`

	动态规划
	`Maximum Product Subarray`
	`Edit Distance`
	`Partition Equal Subset Sum`
	`Longest Common Subsequence`
	`House Robber`
	`Maximum Subarray`
	`Trapping Rain Water`
	`Longest Increasing Subsequence`
	`Longest Palindromic Subsequence`
	`Best Time to Buy and Sell Stock III`
	`Climbing Stairs`
	`Minimum ASCII Delete Sum for Two Strings`
	`Longest Palindromic Substring`
	`Ones and Zeroes`

	单调栈
	`Trapping Rain Water`
	`Next Greater Element I`

	双指针
	`3Sum`
	`Trapping Rain Water`

	回溯
	`Generate Parentheses`
	`Combination Sum`
	`Combination Sum II`

	平衡二叉树
	`Balance A Binary Search Tree`
	`Balanced Binary Tree`

	快慢指针
	`Linked List Cycle II`
	`Linked List Cycle`

	排序
	`Sort an Array`

	搜索
	`Climbing Stairs`

	数组
	`Best Time to Buy and Sell Stock`
	`Remove Element`
	`Majority Element`
	`Remove Duplicates From Sorted Array`
	`Remove Duplicates From Sorted Array II`
	`Rotate Array`

	贪心
	`Jump Game II`
	`Jump Game`
	`Best Time to Buy and Sell Stock II`

	递归
	`Longest Palindromic Substring`

	链表
	`Swap Nodes in Pairs`
	`Reverse Linked List`
	`Linked List Cycle II`
	`Reverse Linked List II`
	`Linked List Cycle`
	`Reverse Nodes In K Group`
	`Merge Two Sorted Lists`