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因為HackMD單篇有字數限制，2023/8/11之後開始更新至每日一題

日期

2022/11

題目列表

日期	題目
11/21	1926. Nearest Exit from Entrance in Maze
11/22	279. Perfect Squares
11/23	36. Valid Sudoku
	148. Sort List
	409. Longest Palindrome
11/24	79. Word Search
11/25	907. Sum of Subarray Minimums
	687. Longest Univalue Path
11/26	1235. Maximum Profit in Job Scheduling
11/27	446. Arithmetic Slices II - Subsequence
11/28	2225. Find Players With Zero or One Losses
11/29	380. Insert Delete GetRandom O(1)
11/30	1207. Unique Number of Occurrences

2022/12

題目列表

日期	題目
12/1	1704. Determine if String Halves Are Alike
	371. Sum of Two Integers
12/2	1657. Determine if Two Strings Are Close
	859. Buddy Strings
12/3	451. Sort Characters By Frequency
12/4	2256. Minimum Average Difference
12/5	876. Middle of the Linked List
12/6	328. Odd Even Linked List
12/7	938. Range Sum of BST
	98. Validate Binary Search Tree
12/8	872. Leaf-Similar Trees
12/9	1026. Maximum Difference Between Node and Ancestor
12/10	1339. Maximum Product of Splitted Binary Tree
12/11	124. Binary Tree Maximum Path Sum
12/12	70. Climbing Stairs
	2498. Frog Jump II
12/13	931. Minimum Falling Path Sum
	1289. Minimum Falling Path Sum II
12/14	198. House Robber
12/15	1143. Longest Common Subsequence
12/16	232. Implement Queue using Stacks
12/17	150. Evaluate Reverse Polish Notation
12/18	739. Daily Temperatures
12/19	1971. Find if Path Exists in Graph
12/20	841. Keys and Rooms
12/21	886. Possible Bipartition
12/22	834. Sum of Distances in Tree
12/23	309. Best Time to Buy and Sell Stock with Cooldown
	121. Best Time to Buy and Sell Stock
	122. Best Time to Buy and Sell Stock II
12/24	790. Domino and Tromino Tiling
12/25	2389. Longest Subsequence With Limited Sum
	791. Custom Sort String
12/26	55. Jump Game
12/27	2279. Maximum Bags With Full Capacity of Rocks
12/28	1962. Remove Stones to Minimize the Total
12/29	1834. Single-Threaded CPU
12/30	797. All Paths From Source to Target
12/31	980. Unique Paths III

2023/1

題目列表

日期	題目
1/1	290. Word Pattern
1/2	520. Detect Capital
1/3	944. Delete Columns to Make Sorted
1/4	2244. Minimum Rounds to Complete All Tasks
1/5	452. Minimum Number of Arrows to Burst Balloons
1/6	1833. Maximum Ice Cream Bars
1/7	134. Gas Station
1/8	149. Max Points on a Line
1/9	144. Binary Tree Preorder Traversal
1/10	100. Same Tree
1/11	1443. Minimum Time to Collect All Apples in a Tree
1/12	1519. Number of Nodes in the Sub-Tree With the Same Label
1/13	2246. Longest Path With Different Adjacent Characters
1/14	1061. Lexicographically Smallest Equivalent String
1/15	2421. Number of Good Paths
1/16	57. Insert Interval
1/17	926. Flip String to Monotone Increasing
1/18	918. Maximum Sum Circular Subarray
1/19	974. Subarray Sums Divisible by K
1/20	491. Non-decreasing Subsequences
1/21	93. Restore IP Addresses
1/22	131. Palindrome Partitioning
1/23	997. Find the Town Judge
1/24	909. Snakes and Ladders
1/25	2359. Find Closest Node to Given Two Nodes
1/26	787. Cheapest Flights Within K Stops
1/27	472. Concatenated Words
1/28	352. Data Stream as Disjoint Intervals
1/29	460. LFU Cache
1/30	1137. N-th Tribonacci Number
1/31	1626. Best Team With No Conflicts

2023/2

題目列表

日期	題目
2/1	1071. Greatest Common Divisor of Strings
2/2	953. Verifying an Alien Dictionary
2/3	6. Zigzag Conversion
2/4	567. Permutation in String
2/5	438. Find All Anagrams in a String
2/6	1470. Shuffle the Array
2/7	904. Fruit Into Baskets
2/8	45. Jump Game II
2/9	2306. Naming a Company
2/10	1162. As Far from Land as Possible
2/11	1129. Shortest Path with Alternating Colors
2/12	2477. Minimum Fuel Cost to Report to the Capital
2/13	1523. Count Odd Numbers in an Interval Range
2/14	67. Add Binary
2/15	989. Add to Array-Form of Integer
2/16	104. Maximum Depth of Binary Tree
2/17	783. Minimum Distance Between BST Nodes
2/18	226. Invert Binary Tree
2/19	103. Binary Tree Zigzag Level Order Traversal
2/20	35. Search Insert Position
2/21	540. Single Element in a Sorted Array
2/22	1011. Capacity To Ship Packages Within D Days
2/23	502. IPO
2/24	1675. Minimize Deviation in Array
2/25	121. Best Time to Buy and Sell Stock
2/26	72. Edit Distance
2/27	427. Construct Quad Tree
2/28	652. Find Duplicate Subtrees

2023/3

題目列表

日期	題目
3/1	912. Sort an Array
3/2	443. String Compression
3/3	28. Find the Index of the First Occurrence in a String
3/4	2444. Count Subarrays With Fixed Bounds
3/5	1345. Jump Game IV
3/6	1539. Kth Missing Positive Number
3/7	2187. Minimum Time to Complete Trips
3/8	875. Koko Eating Bananas
3/9	142. Linked List Cycle II
3/10	382. Linked List Random Node
3/11	109. Convert Sorted List to Binary Search Tree
3/12	23. Merge k Sorted Lists
3/13	101. Symmetric Tree
3/14	129. Sum Root to Leaf Numbers
3/15	958. Check Completeness of a Binary Tree
3/16	106. Construct Binary Tree from Inorder and Postorder Traversal
3/17	208. Implement Trie (Prefix Tree)
3/18	1472. Design Browser History
3/19	211. Design Add and Search Words Data Structure
3/20	605. Can Place Flowers
3/21	2348. Number of Zero-Filled Subarrays
3/22	2492. Minimum Score of a Path Between Two Cities
3/23	1319. Number of Operations to Make Network Connected
3/24	1466. Reorder Routes to Make All Paths Lead to the City Zero
3/25	2316. Count Unreachable Pairs of Nodes in an Undirected Graph
3/26	2360. Longest Cycle in a Graph
3/27	64. Minimum Path Sum
3/28	983. Minimum Cost For Tickets
3/29	1402. Reducing Dishes
3/30	87. Scramble String
3/31	1444. Number of Ways of Cutting a Pizza

2023/4

題目列表

日期	題目
4/1	704. Binary Search
4/2	2300. Successful Pairs of Spells and Potions
4/3	881. Boats to Save People
4/4	2405. Optimal Partition of String
4/5	2439. Minimize Maximum of Array
4/6	1254. Number of Closed Islands
4/7	1020. Number of Enclaves
4/8	133. Clone Graph
4/9	1857. Largest Color Value in a Directed Graph
4/10	20. Valid Parentheses
4/11	2390. Removing Stars From a String
4/12	71. Simplify Path
4/13	946. Validate Stack Sequences
4/14	516. Longest Palindromic Subsequence
4/15	2218. Maximum Value of K Coins From Piles
4/16	1639. Number of Ways to Form a Target String Given a Dictionary
4/17	1431. Kids With the Greatest Number of Candies
4/18	1768. Merge Strings Alternately
4/19	1372. Longest ZigZag Path in a Binary Tree
4/20	662. Maximum Width of Binary Tree
4/21	879. Profitable Schemes
4/22	1312. Minimum Insertion Steps to Make a String Palindrome
4/23	1416. Restore The Array
4/24	1046. Last Stone Weight
4/25	2336. Smallest Number in Infinite Set
4/26	258. Add Digits
4/27	319. Bulb Switcher
4/28	839. Similar String Groups
4/29	1697. Checking Existence of Edge Length Limited Paths
4/30	1579. Remove Max Number of Edges to Keep Graph Fully Traversable

2023/5

題目列表

日期	題目
5/1	1491. Average Salary Excluding the Minimum and Maximum Salary
5/2	1822. Sign of the Product of an Array
5/3	2215. Find the Difference of Two Arrays
5/4	649. Dota2 Senate
5/5	1456. Maximum Number of Vowels in a Substring of Given Length
5/6	1498. Number of Subsequences That Satisfy the Given Sum Condition
5/7	1964. Find the Longest Valid Obstacle Course at Each Position
5/8	1572. Matrix Diagonal Sum
5/9	54. Spiral Matrix
5/10	59. Spiral Matrix II
5/11	1035. Uncrossed Lines
5/12	2140. Solving Questions With Brainpower
5/13	2466. Count Ways To Build Good Strings
5/14	1799. Maximize Score After N Operations
5/15	1721. Swapping Nodes in a Linked List
5/16	24. Swap Nodes in Pairs
5/17	2130. Maximum Twin Sum of a Linked List
5/18	1557. Minimum Number of Vertices to Reach All Nodes
5/19	785. Is Graph Bipartite?
5/20	399. Evaluate Division
5/21	934. Shortest Bridge
5/22	347. Top K Frequent Elements
5/23	703. Kth Largest Element in a Stream
5/24	2542. Maximum Subsequence Score
5/25	837. New 21 Game
5/26	1140. Stone Game II
	877. Stone Game
5/27	1406. Stone Game III
5/28	1547. Minimum Cost to Cut a Stick
5/29	1603. Design Parking System
5/30	705. Design HashSet
5/31	1396. Design Underground System

2023/6

題目列表

日期	題目
6/1	1091. Shortest Path in Binary Matrix
6/2	2101. Detonate the Maximum Bombs
6/3	1376. Time Needed to Inform All Employees
6/4	547. Number of Provinces
6/5	1232. Check If It Is a Straight Line
6/6	1502. Can Make Arithmetic Progression From Sequence
6/7	1318. Minimum Flips to Make a OR b Equal to c
6/8	1351. Count Negative Numbers in a Sorted Matrix
6/9	744. Find Smallest Letter Greater Than Target
6/10	1802. Maximum Value at a Given Index in a Bounded Array
6/11	1146. Snapshot Array
6/12	228. Summary Ranges
6/13	2352. Equal Row and Column Pairs
6/14	530. Minimum Absolute Difference in BST
6/15	1161. Maximum Level Sum of a Binary Tree
6/16	1569. Number of Ways to Reorder Array to Get Same BST
6/17	1187. Make Array Strictly Increasing
6/18	2328. Number of Increasing Paths in a Grid
6/19	1732. Find the Highest Altitude
6/20	2090. K Radius Subarray Averages
6/21	2448. Minimum Cost to Make Array Equal
6/22	714. Best Time to Buy and Sell Stock with Transaction Fee
6/23	1027. Longest Arithmetic Subsequence
6/24	956. Tallest Billboard
6/25	1575. Count All Possible Routes
6/26	2462. Total Cost to Hire K Workers
6/27	373. Find K Pairs with Smallest Sums
6/28	1514. Path with Maximum Probability
6/29	864. Shortest Path to Get All Keys
6/30	1970. Last Day Where You Can Still Cross

2023/7

題目列表

日期	題目
7/1	2305. Fair Distribution of Cookies
7/2	1601. Maximum Number of Achievable Transfer Requests
7/3	859. Buddy Strings
7/4	137. Single Number II
7/5	1493. Longest Subarray of 1's After Deleting One Element
7/6	209. Minimum Size Subarray Sum
7/7	2024. Maximize the Confusion of an Exam
7/8	2551. Put Marbles in Bags
7/9	2272. Substring With Largest Variance
7/10	111. Minimum Depth of Binary Tree
7/11	863. All Nodes Distance K in Binary Tree
7/12	802. Find Eventual Safe States
7/13	207. Course Schedule
7/14	1218. Longest Arithmetic Subsequence of Given Difference
7/15	1751. Maximum Number of Events That Can Be Attended II
7/16	1125. Smallest Sufficient Team
7/17	445. Add Two Numbers II
7/18	146. LRU Cache
7/19	435. Non-overlapping Intervals
7/20	735. Asteroid Collision
7/21	673. Number of Longest Increasing Subsequence
7/22	688. Knight Probability in Chessboard
7/23	894. All Possible Full Binary Trees
7/24	50. Pow(x, n)
7/25	852. Peak Index in a Mountain Array
7/26	1870. Minimum Speed to Arrive on Time
7/27	2141. Maximum Running Time of N Computers
7/28	486. Predict the Winner
7/29	808. Soup Servings
7/30	664. Strange Printer
7/31	712. Minimum ASCII Delete Sum for Two Strings

2023/8

日期	題目
8/1	77. Combinations
8/2	46. Permutations
8/3	17. Letter Combinations of a Phone Number
8/4	139. Word Break
8/5	95. Unique Binary Search Trees II
8/6	920. Number of Music Playlists
8/7	74. Search a 2D Matrix
8/8	33. Search in Rotated Sorted Array
8/9	2616. Minimize the Maximum Difference of Pairs
8/10	81. Search in Rotated Sorted Array II

30 Days of LC JavaScript Challenge

題目列表

Day	Topic	Problem
1 (5/5)	Closure	Create Hello World Function
2 (5/6)	Closure	Counter
3 (5/7)	Closure	Counter II
4 (5/8)	Basic Array Transforms	Apply Transform Over Each Element in Array
5 (5/9)	Basic Array Transforms	Filter Elements from Array
6 (5/10)	Basic Array Transforms	Array Reduce Transformation
7 (5/11)	Function input and Output	Function Composition
8 (5/12)	Function input and Output	Allow One Function Call
9 (5/13)	Function input and Output	Memoize
10 (5/14)	Function input and Output	Curry
11 (5/15)	Promise	Sleep
12 (5/16)	Promise	Promise Time Limit
13 (5/17)	Promise	Promise Pool
14 (5/18)	Time (setTimeout)	Cache With Time Limit
15 (5/19)	Time (setTimeout)	Debounce
16 (5/20)	Time (setTimeout)	Throttle
17 (5/21)	JSON / Recursion / Important Utilities	JSON Deep Equal
18 (5/22)	JSON / Recursion / Important Utilities	Convert Object to JSON String
19 (5/23)	JSON / Recursion / Important Utilities	Array of Objects to Matrix
20 (5/24)	JSON / Recursion / Important Utilities	Differences Between Two Objects
21 (5/25)	JSON / Recursion / Important Utilities	Chunk Array
22 (5/26)	JSON / Recursion / Important Utilities	Flatten Deeply Nested Array
23 (5/27)	This	Array Prototype Last
24 (5/28)	This	Group By
25 (5/29)	This	Check if Object Instance of Class
26 (5/30)	This	Call Function with Custom Context
27 (5/31)	Classes	Event Emitter
28 (6/1)	Classes	Array Wrapper
29 (6/2)	Generators	Generate Fibonacci Sequence
30 (6/3)	Generators	Nested Array Generator

難度

Easy

題目列表

• 20. Valid Parentheses
• 35. Search Insert Position
• 67. Add Binary
• 70. Climbing Stairs
• 100. Same Tree
• 101. Symmetric Tree
• 104. Maximum Depth of Binary Tree
• 111. Minimum Depth of Binary Tree
• 121. Best Time to Buy and Sell Stock
• 144. Binary Tree Preorder Traversal
• 226. Invert Binary Tree
• 228. Summary Ranges
• 232. Implement Queue using Stacks
• 258. Add Digits
• 290. Word Pattern
• 409. Longest Palindrome
• 520. Detect Capital
• 530. Minimum Absolute Difference in BST
• 605. Can Place Flowers
• 703. Kth Largest Element in a Stream
• 704. Binary Search
• 705. Design HashSet
• 744. Find Smallest Letter Greater Than Target
• 783. Minimum Distance Between BST Nodes
• 859. Buddy Strings
• 872. Leaf-Similar Trees
• 876. Middle of the Linked List
• 938. Range Sum of BST
• 953. Verifying an Alien Dictionary
• 997. Find the Town Judge
• 1046. Last Stone Weight
• 1137. N-th Tribonacci Number
• 1207. Unique Number of Occurrences
• 1232. Check If It Is a Straight Line
• 1431. Kids With the Greatest Number of Candies
• 1470. Shuffle the Array
• 1491. Average Salary Excluding the Minimum and Maximum Salary
• 1502. Can Make Arithmetic Progression From Sequence
• 1523. Count Odd Numbers in an Interval Range
• 1539. Kth Missing Positive Number
• 1603. Design Parking System
• 1704. Determine if String Halves Are Alike
• 1732. Find the Highest Altitude
• 1768. Merge Strings Alternately
• 1822. Sign of the Product of an Array
• 2389. Longest Subsequence With Limited Sum

Medium

題目列表

• 6. Zigzag Conversion
• 17. Letter Combinations of a Phone Number
• 28. Find the Index of the First Occurrence in a String
• 36. Valid Sudoku
• 45. Jump Game II
• 46. Permutations
• 54. Spiral Matrix
• 55. Jump Game
• 57. Insert Interval
• 64. Minimum Path Sum
• 71. Simplify Path
• 77. Combinations
• 79. Word Search
• 81. Search in Rotated Sorted Array II
• 93. Restore IP Addresses
• 95. Unique Binary Search Trees II
• 98. Validate Binary Search Tree
• 103. Binary Tree Zigzag Level Order Traversal
• 106. Construct Binary Tree from Inorder and Postorder Traversal
• 109. Convert Sorted List to Binary Search Tree
• 122. Best Time to Buy and Sell Stock II
• 129. Sum Root to Leaf Numbers
• 131. Palindrome Partitioning
• 133. Clone Graph
• 134. Gas Station
• 137. Single Number II
• 139. Word Break
• 142. Linked List Cycle II
• 146. LRU Cache
• 148. Sort List
• 150. Evaluate Reverse Polish Notation
• 198. House Robber
• 207. Course Schedule
• 208. Implement Trie (Prefix Tree)
• 209. Minimum Size Subarray Sum
• 211. Design Add and Search Words Data Structure
• 279. Perfect Squares
• 309. Best Time to Buy and Sell Stock with Cooldown
• 319. Bulb Switcher
• 328. Odd Even Linked List
• 347. Top K Frequent Elements
• 371. Sum of Two Integers
• 373. Find K Pairs with Smallest Sums
• 380. Insert Delete GetRandom O(1)
• 382. Linked List Random Node
• 399. Evaluate Division
• 427. Construct Quad Tree
• 435. Non-overlapping Intervals
• 438. Find All Anagrams in a String
• 443. String Compression
• 445. Add Two Numbers II
• 451. Sort Characters By Frequency
• 452. Minimum Number of Arrows to Burst Balloons
• 486. Predict the Winner
• 491. Non-decreasing Subsequences
• 540. Single Element in a Sorted Array
• 547. Number of Provinces
• 567. Permutation in String
• 649. Dota2 Senate
• 652. Find Duplicate Subtrees
• 662. Maximum Width of Binary Tree
• 673. Number of Longest Increasing Subsequence
• 687. Longest Univalue Path
• 688. Knight Probability in Chessboard
• 712. Minimum ASCII Delete Sum for Two Strings
• 714. Best Time to Buy and Sell Stock with Transaction Fee
• 735. Asteroid Collision
• 739. Daily Temperatures
• 787. Cheapest Flights Within K Stops
• 790. Domino and Tromino Tiling
• 791. Custom Sort String
• 797. All Paths From Source to Target
• 802. Find Eventual Safe States
• 808. Soup Servings
• 837. New 21 Game
• 841. Keys and Rooms
• 852. Peak Index in a Mountain Array
• 875. Koko Eating Bananas
• 877. Stone Game
• 881. Boats to Save People
• 886. Possible Bipartition
• 894. All Possible Full Binary Trees
• 904. Fruit Into Baskets
• 907. Sum of Subarray Minimums
• 909. Snakes and Ladders
• 912. Sort an Array
• 918. Maximum Sum Circular Subarray
• 926. Flip String to Monotone Increasing
• 931. Minimum Falling Path Sum
• 934. Shortest Bridge
• 946. Validate Stack Sequences
• 958. Check Completeness of a Binary Tree
• 974. Subarray Sums Divisible by K
• 983. Minimum Cost For Tickets
• 1011. Capacity To Ship Packages Within D Days
• 1020. Number of Enclaves
• 1026. Maximum Difference Between Node and Ancestor
• 1027. Longest Arithmetic Subsequence
• 1061. Lexicographically Smallest Equivalent String
• 1091. Shortest Path in Binary Matrix
• 1129. Shortest Path with Alternating Colors
• 1140. Stone Game II
• 1143. Longest Common Subsequence
• 1146. Snapshot Array
• 1161. Maximum Level Sum of a Binary Tree
• 1162. As Far from Land as Possible
• 1218. Longest Arithmetic Subsequence of Given Difference
• 1318. Minimum Flips to Make a OR b Equal to c
• 1319. Number of Operations to Make Network Connected
• 1339. Maximum Product of Splitted Binary Tree
• 1372. Longest ZigZag Path in a Binary Tree
• 1376. Time Needed to Inform All Employees
• 1396. Design Underground System
• 1402. Reducing Dishes
• 1443. Minimum Time to Collect All Apples in a Tree
• 1456. Maximum Number of Vowels in a Substring of Given Length
• 1466. Reorder Routes to Make All Paths Lead to the City Zero
• 1472. Design Browser History
• 1493. Longest Subarray of 1's After Deleting One Element
• 1498. Number of Subsequences That Satisfy the Given Sum Condition
• 1514. Path with Maximum Probability
• 1519. Number of Nodes in the Sub-Tree With the Same Label
• 1557. Minimum Number of Vertices to Reach All Nodes
• 1626. Best Team With No Conflicts
• 1657. Determine if Two Strings Are Close
• 1721. Swapping Nodes in a Linked List
• 1802. Maximum Value at a Given Index in a Bounded Array
• 1833. Maximum Ice Cream Bars
• 1834. Single-Threaded CPU
• 1870. Minimum Speed to Arrive on Time
• 1926. Nearest Exit from Entrance in Maze
• 1962. Remove Stones to Minimize the Total
• 2024. Maximize the Confusion of an Exam
• 2090. K Radius Subarray Averages
• 2101. Detonate the Maximum Bombs
• 2130. Maximum Twin Sum of a Linked List
• 2140. Solving Questions With Brainpower
• 2187. Minimum Time to Complete Trips
• 2225. Find Players With Zero or One Losses
• 2244. Minimum Rounds to Complete All Tasks
• 2256. Minimum Average Difference
• 2279. Maximum Bags With Full Capacity of Rocks
• 2300. Successful Pairs of Spells and Potions
• 2305. Fair Distribution of Cookies
• 2316. Count Unreachable Pairs of Nodes in an Undirected Graph
• 2336. Smallest Number in Infinite Set
• 2348. Number of Zero-Filled Subarrays
• 2352. Equal Row and Column Pairs
• 2359. Find Closest Node to Given Two Nodes
• 2390. Removing Stars From a String
• 2405. Optimal Partition of String
• 2439. Minimize Maximum of Array
• 2462. Total Cost to Hire K Workers
• 2466. Count Ways To Build Good Strings
• 2477. Minimum Fuel Cost to Report to the Capital
• 2492. Minimum Score of a Path Between Two Cities
• 2498. Frog Jump II
• 2542. Maximum Subsequence Score
• 2616. Minimize the Maximum Difference of Pairs

Hard

題目列表

• 23. Merge k Sorted Lists
• 72. Edit Distance
• 87. Scramble String
• 124. Binary Tree Maximum Path Sum
• 149. Max Points on a Line
• 352. Data Stream as Disjoint Intervals
• 446. Arithmetic Slices II - Subsequence
• 460. LFU Cache
• 472. Concatenated Words
• 502. IPO
• 664. Strange Printer
• 834. Sum of Distances in Tree
• 839. Similar String Groups
• 879. Profitable Schemes
• 920. Number of Music Playlists
• 956. Tallest Billboard
• 980. Unique Paths III
• 1125. Smallest Sufficient Team
• 1187. Make Array Strictly Increasing
• 1235. Maximum Profit in Job Scheduling
• 1289. Minimum Falling Path Sum II
• 1312. Minimum Insertion Steps to Make a String Palindrome
• 1345. Jump Game IV
• 1406. Stone Game III
• 1416. Restore The Array
• 1444. Number of Ways of Cutting a Pizza
• 1547. Minimum Cost to Cut a Stick
• 1569. Number of Ways to Reorder Array to Get Same BST
• 1575. Count All Possible Routes
• 1579. Remove Max Number of Edges to Keep Graph Fully Traversable
• 1601. Maximum Number of Achievable Transfer Requests
• 1639. Number of Ways to Form a Target String Given a Dictionary
• 1675. Minimize Deviation in Array
• 1697. Checking Existence of Edge Length Limited Paths
• 1751. Maximum Number of Events That Can Be Attended II
• 1799. Maximize Score After N Operations
• 1857. Largest Color Value in a Directed Graph
• 1964. Find the Longest Valid Obstacle Course at Each Position
• 2141. Maximum Running Time of N Computers
• 2218. Maximum Value of K Coins From Piles
• 2246. Longest Path With Different Adjacent Characters
• 2272. Substring With Largest Variance
• 2306. Naming a Company
• 2328. Number of Increasing Paths in a Grid
• 2360. Longest Cycle in a Graph
• 2421. Number of Good Paths
• 2444. Count Subarrays With Fixed Bounds
• 2551. Put Marbles in Bags

題型

Array

題目列表

• 35. Search Insert Position
• 36. Valid Sudoku
• 45. Jump Game II
• 46. Permutations
• 54. Spiral Matrix
• 55. Jump Game
• 57. Insert Interval
• 64. Minimum Path Sum
• 79. Word Search
• 81. Search in Rotated Sorted Array II
• 106. Construct Binary Tree from Inorder and Postorder Traversal
• 121. Best Time to Buy and Sell Stock
• 122. Best Time to Buy and Sell Stock II
• 134. Gas Station
• 137. Single Number II
• 139. Word Break
• 149. Max Points on a Line
• 150. Evaluate Reverse Polish Notation
• 198. House Robber
• 209. Minimum Size Subarray Sum
• 228. Summary Ranges
• 309. Best Time to Buy and Sell Stock with Cooldown
• 347. Top K Frequent Elements
• 373. Find K Pairs with Smallest Sums
• 380. Insert Delete GetRandom O(1)
• 399. Evaluate Division
• 427. Construct Quad Tree
• 435. Non-overlapping Intervals
• 446. Arithmetic Slices II - Subsequence
• 452. Minimum Number of Arrows to Burst Balloons
• 472. Concatenated Words
• 486. Predict the Winner
• 491. Non-decreasing Subsequences
• 502. IPO
• 540. Single Element in a Sorted Array
• 605. Can Place Flowers
• 673. Number of Longest Increasing Subsequence
• 704. Binary Search
• 705. Design HashSet
• 714. Best Time to Buy and Sell Stock with Transaction Fee
• 735. Asteroid Collision
• 739. Daily Temperatures
• 744. Find Smallest Letter Greater Than Target
• 839. Similar String Groups
• 852. Peak Index in a Mountain Array
• 875. Koko Eating Bananas
• 877. Stone Game
• 879. Profitable Schemes
• 881. Boats to Save People
• 904. Fruit Into Baskets
• 907. Sum of Subarray Minimums
• 909. Snakes and Ladders
• 912. Sort an Array
• 918. Maximum Sum Circular Subarray
• 931. Minimum Falling Path Sum
• 934. Shortest Bridge
• 946. Validate Stack Sequences
• 953. Verifying an Alien Dictionary
• 956. Tallest Billboard
• 974. Subarray Sums Divisible by K
• 980. Unique Paths III
• 983. Minimum Cost For Tickets
• 997. Find the Town Judge
• 1011. Capacity To Ship Packages Within D Days
• 1020. Number of Enclaves
• 1027. Longest Arithmetic Subsequence
• 1046. Last Stone Weight
• 1091. Shortest Path in Binary Matrix
• 1125. Smallest Sufficient Team
• 1140. Stone Game II
• 1146. Snapshot Array
• 1162. As Far from Land as Possible
• 1187. Make Array Strictly Increasing
• 1207. Unique Number of Occurrences
• 1218. Longest Arithmetic Subsequence of Given Difference
• 1232. Check If It Is a Straight Line
• 1289. Minimum Falling Path Sum II
• 1345. Jump Game IV
• 1402. Reducing Dishes
• 1406. Stone Game III
• 1431. Kids With the Greatest Number of Candies
• 1444. Number of Ways of Cutting a Pizza
• 1470. Shuffle the Array
• 1472. Design Browser History
• 1491. Average Salary Excluding the Minimum and Maximum Salary
• 1493. Longest Subarray of 1's After Deleting One Element
• 1498. Number of Subsequences That Satisfy the Given Sum Condition
• 1502. Can Make Arithmetic Progression From Sequence
• 1514. Path with Maximum Probability
• 1539. Kth Missing Positive Number
• 1547. Minimum Cost to Cut a Stick
• 1575. Count All Possible Routes
• 1601. Maximum Number of Achievable Transfer Requests
• 1626. Best Team With No Conflicts
• 1639. Number of Ways to Form a Target String Given a Dictionary
• 1675. Minimize Deviation in Array
• 1697. Checking Existence of Edge Length Limited Paths
• 1732. Find the Highest Altitude
• 1751. Maximum Number of Events That Can Be Attended II
• 1799. Maximize Score After N Operations
• 1822. Sign of the Product of an Array
• 1833. Maximum Ice Cream Bars
• 1834. Single-Threaded CPU
• 1870. Minimum Speed to Arrive on Time
• 1926. Nearest Exit from Entrance in Maze
• 1962. Remove Stones to Minimize the Total
• 1964. Find the Longest Valid Obstacle Course at Each Position
• 2024. Maximize the Confusion of an Exam
• 2090. K Radius Subarray Averages
• 2101. Detonate the Maximum Bombs
• 2140. Solving Questions With Brainpower
• 2141. Maximum Running Time of N Computers
• 2187. Minimum Time to Complete Trips
• 2218. Maximum Value of K Coins From Piles
• 2225. Find Players With Zero or One Losses
• 2244. Minimum Rounds to Complete All Tasks
• 2246. Longest Path With Different Adjacent Characters
• 2256. Minimum Average Difference
• 2272. Substring With Largest Variance
• 2279. Maximum Bags With Full Capacity of Rocks
• 2300. Successful Pairs of Spells and Potions
• 2305. Fair Distribution of Cookies
• 2306. Naming a Company
• 2328. Number of Increasing Paths in a Grid
• 2348. Number of Zero-Filled Subarrays
• 2352. Equal Row and Column Pairs
• 2389. Longest Subsequence With Limited Sum
• 2421. Number of Good Paths
• 2439. Minimize Maximum of Array
• 2444. Count Subarrays With Fixed Bounds
• 2462. Total Cost to Hire K Workers
• 2498. Frog Jump II
• 2542. Maximum Subsequence Score
• 2551. Put Marbles in Bags
• 2616. Minimize the Maximum Difference of Pairs

Linked List

題目列表

• 23. Merge k Sorted Lists
• 109. Convert Sorted List to Binary Search Tree
• 142. Linked List Cycle II
• 146. LRU Cache
• 148. Sort List
• 328. Odd Even Linked List
• 382. Linked List Random Node
• 445. Add Two Numbers II
• 460. LFU Cache
• 705. Design HashSet
• 876. Middle of the Linked List
• 1472. Design Browser History
• 2130. Maximum Twin Sum of a Linked List

Matrix

題目列表

• 36. Valid Sudoku
• 54. Spiral Matrix
• 64. Minimum Path Sum
• 79. Word Search
• 427. Construct Quad Tree
• 909. Snakes and Ladders
• 931. Minimum Falling Path Sum
• 934. Shortest Bridge
• 980. Unique Paths III
• 1020. Number of Enclaves
• 1091. Shortest Path in Binary Matrix
• 1162. As Far from Land as Possible
• 1235. Maximum Profit in Job Scheduling
• 1289. Minimum Falling Path Sum II
• 1444. Number of Ways of Cutting a Pizza
• 1721. Swapping Nodes in a Linked List
• 1926. Nearest Exit from Entrance in Maze
• 2328. Number of Increasing Paths in a Grid
• 2352. Equal Row and Column Pairs

String

題目列表

• 6. Zigzag Conversion
• 17. Letter Combinations of a Phone Number
• 20. Valid Parentheses
• 28. Find the Index of the First Occurrence in a String
• 67. Add Binary
• 71. Simplify Path
• 72. Edit Distance
• 87. Scramble String
• 93. Restore IP Addresses
• 131. Palindrome Partitioning
• 139. Word Break
• 208. Implement Trie (Prefix Tree)
• 211. Design Add and Search Words Data Structure
• 290. Word Pattern
• 409. Longest Palindrome
• 438. Find All Anagrams in a String
• 443. String Compression
• 451. Sort Characters By Frequency
• 472. Concatenated Words
• 520. Detect Capital
• 567. Permutation in String
• 649. Dota2 Senate
• 664. Strange Printer
• 712. Minimum ASCII Delete Sum for Two Strings
• 791. Custom Sort String
• 839. Similar String Groups
• 859. Buddy Strings
• 926. Flip String to Monotone Increasing
• 953. Verifying an Alien Dictionary
• 1061. Lexicographically Smallest Equivalent String
• 1143. Longest Common Subsequence
• 1312. Minimum Insertion Steps to Make a String Palindrome
• 1396. Design Underground System
• 1416. Restore The Array
• 1456. Maximum Number of Vowels in a Substring of Given Length
• 1639. Number of Ways to Form a Target String Given a Dictionary
• 1657. Determine if Two Strings Are Close
• 1704. Determine if String Halves Are Alike
• 1768. Merge Strings Alternately
• 2024. Maximize the Confusion of an Exam
• 2246. Longest Path With Different Adjacent Characters
• 2306. Naming a Company
• 2390. Removing Stars From a String
• 2405. Optimal Partition of String

Math

題目列表

• 67. Add Binary
• 70. Climbing Stairs
• 149. Max Points on a Line
• 150. Evaluate Reverse Polish Notation
• 258. Add Digits
• 279. Perfect Squares
• 319. Bulb Switcher
• 371. Sum of Two Integers
• 380. Insert Delete GetRandom O(1)
• 382. Linked List Random Node
• 445. Add Two Numbers II
• 486. Predict the Winner
• 808. Soup Servings
• 837. New 21 Game
• 877. Stone Game
• 920. Number of Music Playlists
• 1137. N-th Tribonacci Number
• 1232. Check If It Is a Straight Line
• 1140. Stone Game II
• 1406. Stone Game III
• 1523. Count Odd Numbers in an Interval Range
• 1569. Number of Ways to Reorder Array to Get Same BST
• 1799. Maximize Score After N Operations
• 1822. Sign of the Product of an Array
• 2101. Detonate the Maximum Bombs
• 2348. Number of Zero-Filled Subarrays

Bit Manipulation

題目列表

• 67. Add Binary
• 137. Single Number II
• 371. Sum of Two Integers
• 491. Non-decreasing Subsequences
• 980. Unique Paths III
• 1125. Smallest Sufficient Team
• 1318. Minimum Flips to Make a OR b Equal to c
• 1601. Maximum Number of Achievable Transfer Requests
• 1799. Maximize Score After N Operations
• 2305. Fair Distribution of Cookies
• 2306. Naming a Company

Stack/Queue

題目列表

• 20. Valid Parentheses
• 71. Simplify Path
• 144. Binary Tree Preorder Traversal
• 150. Evaluate Reverse Polish Notation
• 232. Implement Queue using Stacks
• 445. Add Two Numbers II
• 649. Dota2 Senate
• 735. Asteroid Collision
• 739. Daily Temperatures
• 907. Sum of Subarray Minimums
• 918. Maximum Sum Circular Subarray
• 946. Validate Stack Sequences
• 1472. Design Browser History
• 2130. Maximum Twin Sum of a Linked List
• 2390. Removing Stars From a String
• 2444. Count Subarrays With Fixed Bounds

Hash Table

題目列表

• 17. Letter Combinations of a Phone Number
• 36. Valid Sudoku
• 106. Construct Binary Tree from Inorder and Postorder Traversal
• 133. Clone Graph
• 139. Word Break
• 142. Linked List Cycle II
• 146. LRU Cache
• 149. Max Points on a Line
• 208. Implement Trie (Prefix Tree)
• 290. Word Pattern
• 347. Top K Frequent Elements
• 380. Insert Delete GetRandom O(1)
• 409. Longest Palindrome
• 438. Find All Anagrams in a String
• 451. Sort Characters By Frequency
• 460. LFU Cache
• 491. Non-decreasing Subsequences
• 567. Permutation in String
• 652. Find Duplicate Subtrees
• 705. Design HashSet
• 791. Custom Sort String
• 859. Buddy Strings
• 904. Fruit Into Baskets
• 953. Verifying an Alien Dictionary
• 974. Subarray Sums Divisible by K
• 997. Find the Town Judge
• 1027. Longest Arithmetic Subsequence
• 1146. Snapshot Array
• 1207. Unique Number of Occurrences
• 1218. Longest Arithmetic Subsequence of Given Difference
• 1345. Jump Game IV
• 1396. Design Underground System
• 1443. Minimum Time to Collect All Apples in a Tree
• 1657. Determine if Two Strings Are Close
• 1857. Largest Color Value in a Directed Graph
• 2225. Find Players With Zero or One Losses
• 2244. Minimum Rounds to Complete All Tasks
• 2306. Naming a Company
• 2336. Smallest Number in Infinite Set
• 2352. Equal Row and Column Pairs
• 2405. Optimal Partition of String

Prefix Sum

題目列表

• 974. Subarray Sums Divisible by K
• 1732. Find the Highest Altitude
• 2024. Maximize the Confusion of an Exam
• 2218. Maximum Value of K Coins From Piles
• 2256. Minimum Average Difference
• 2389. Longest Subsequence With Limited Sum
• 2439. Minimize Maximum of Array

Greedy

題目列表

• 45. Jump Game II
• 55. Jump Game
• 122. Best Time to Buy and Sell Stock II
• 134. Gas Station
• 409. Longest Palindrome
• 435. Non-overlapping Intervals
• 452. Minimum Number of Arrows to Burst Balloons
• 502. IPO
• 605. Can Place Flowers
• 649. Dota2 Senate
• 714. Best Time to Buy and Sell Stock with Transaction Fee
• 881. Boats to Save People
• 1402. Reducing Dishes
• 1675. Minimize Deviation in Array
• 1802. Maximum Value at a Given Index in a Bounded Array
• 1833. Maximum Ice Cream Bars
• 2141. Maximum Running Time of N Computers
• 2244. Minimum Rounds to Complete All Tasks
• 2279. Maximum Bags With Full Capacity of Rocks
• 2389. Longest Subsequence With Limited Sum
• 2405. Optimal Partition of String
• 2439. Minimize Maximum of Array
• 2498. Frog Jump II
• 2542. Maximum Subsequence Score
• 2551. Put Marbles in Bags
• 2616. Minimize the Maximum Difference of Pairs

Backtracking

題目列表

• 17. Letter Combinations of a Phone Number
• 46. Permutations
• 77. Combinations
• 79. Word Search
• 93. Restore IP Addresses
• 95. Unique Binary Search Trees II
• 131. Palindrome Partitioning
• 491. Non-decreasing Subsequences
• 797. All Paths From Source to Target
• 980. Unique Paths III
• 1601. Maximum Number of Achievable Transfer Requests
• 1799. Maximize Score After N Operations
• 2305. Fair Distribution of Cookies

Two Pointers

題目列表

• 28. Find the Index of the First Occurrence in a String
• 142. Linked List Cycle II
• 443. String Compression
• 567. Permutation in String
• 876. Middle of the Linked List
• 881. Boats to Save People
• 1498. Number of Subsequences That Satisfy the Given Sum Condition
• 1721. Swapping Nodes in a Linked List
• 1768. Merge Strings Alternately
• 2130. Maximum Twin Sum of a Linked List
• 2300. Successful Pairs of Spells and Potions
• 2462. Total Cost to Hire K Workers

Sliding Window

題目列表

• 209. Minimum Size Subarray Sum
  
• 438. Find All Anagrams in a String
• 567. Permutation in String
• 837. New 21 Game
• 904. Fruit Into Baskets
• 1456. Maximum Number of Vowels in a Substring of Given Length
• 1493. Longest Subarray of 1's After Deleting One Element
• 2024. Maximize the Confusion of an Exam
• 2090. K Radius Subarray Averages
• 2444. Count Subarrays With Fixed Bounds

Sorting

題目列表

• 148. Sort List
• 347. Top K Frequent Elements
• 435. Non-overlapping Intervals
• 451. Sort Characters By Frequency
• 452. Minimum Number of Arrows to Burst Balloons
• 502. IPO
• 791. Custom Sort String
• 881. Boats to Save People
• 912. Sort an Array
• 1235. Maximum Profit in Job Scheduling
• 1402. Reducing Dishes
• 1491. Average Salary Excluding the Minimum and Maximum Salary
• 1498. Number of Subsequences That Satisfy the Given Sum Condition
• 1502. Can Make Arithmetic Progression From Sequence
• 1547. Minimum Cost to Cut a Stick
• 1626. Best Team With No Conflicts
• 1657. Determine if Two Strings Are Close
• 1751. Maximum Number of Events That Can Be Attended II
• 1833. Maximum Ice Cream Bars
• 1834. Single-Threaded CPU
• 2141. Maximum Running Time of N Computers
• 2225. Find Players With Zero or One Losses
• 2279. Maximum Bags With Full Capacity of Rocks
• 2300. Successful Pairs of Spells and Potions
• 2389. Longest Subsequence With Limited Sum
• 2542. Maximum Subsequence Score
• 2551. Put Marbles in Bags

Tree

題目列表

• 95. Unique Binary Search Trees II
• 98. Validate Binary Search Tree
• 100. Same Tree
• 101. Symmetric Tree
• 103. Binary Tree Zigzag Level Order Traversal
• 104. Maximum Depth of Binary Tree
• 106. Construct Binary Tree from Inorder and Postorder Traversal
• 109. Convert Sorted List to Binary Search Tree
• 111. Minimum Depth of Binary Tree
• 124. Binary Tree Maximum Path Sum
• 129. Sum Root to Leaf Numbers
• 144. Binary Tree Preorder Traversal
• 208. Implement Trie (Prefix Tree)(Trie)
• 226. Invert Binary Tree
• 427. Construct Quad Tree
• 530. Minimum Absolute Difference in BST
• 652. Find Duplicate Subtrees
• 662. Maximum Width of Binary Tree
• 687. Longest Univalue Path
• 703. Kth Largest Element in a Stream
• 783. Minimum Distance Between BST Nodes
• 834. Sum of Distances in Tree
• 872. Leaf-Similar Trees
• 894. All Possible Full Binary Trees
• 938. Range Sum of BST
• 958. Check Completeness of a Binary Tree
• 1026. Maximum Difference Between Node and Ancestor
• 1161. Maximum Level Sum of a Binary Tree
• 1339. Maximum Product of Splitted Binary Tree
• 1372. Longest ZigZag Path in a Binary Tree
• 1376. Time Needed to Inform All Employees
• 1443. Minimum Time to Collect All Apples in a Tree
• 1519. Number of Nodes in the Sub-Tree With the Same Label
• 1569. Number of Ways to Reorder Array to Get Same BST
• 2246. Longest Path With Different Adjacent Characters
• 2421. Number of Good Paths
• 2477. Minimum Fuel Cost to Report to the Capital

Heap

題目列表

• 23. Merge k Sorted Lists
• 347. Top K Frequent Elements
• 373. Find K Pairs with Smallest Sums
• 451. Sort Characters By Frequency
• 502. IPO
• 703. Kth Largest Element in a Stream
• 787. Cheapest Flights Within K Stops
• 1046. Last Stone Weight
• 1514. Path with Maximum Probability
• 1675. Minimize Deviation in Array
• 1834. Single-Threaded CPU
• 1962. Remove Stones to Minimize the Total
• 2336. Smallest Number in Infinite Set
• 2462. Total Cost to Hire K Workers
• 2542. Maximum Subsequence Score
• 2551. Put Marbles in Bags

Binary Search

題目列表

• 35. Search Insert Position
• 81. Search in Rotated Sorted Array II
• 98. Validate Binary Search Tree
• 209. Minimum Size Subarray Sum
• 352. Data Stream as Disjoint Intervals
• 540. Single Element in a Sorted Array
• 704. Binary Search
• 744. Find Smallest Letter Greater Than Target
• 852. Peak Index in a Mountain Array
• 875. Koko Eating Bananas
• 938. Range Sum of BST
• 1011. Capacity To Ship Packages Within D Days
• 1027. Longest Arithmetic Subsequence
• 1146. Snapshot Array
• 1187. Make Array Strictly Increasing
• 1235. Maximum Profit in Job Scheduling
• 1498. Number of Subsequences That Satisfy the Given Sum Condition
• 1539. Kth Missing Positive Number
• 1751. Maximum Number of Events That Can Be Attended II
• 1802. Maximum Value at a Given Index in a Bounded Array
• 1870. Minimum Speed to Arrive on Time
• 1964. Find the Longest Valid Obstacle Course at Each Position
• 2024. Maximize the Confusion of an Exam
• 2141. Maximum Running Time of N Computers
• 2187. Minimum Time to Complete Trips
• 2300. Successful Pairs of Spells and Potions
• 2389. Longest Subsequence With Limited Sum
• 2439. Minimize Maximum of Array
• 2498. Frog Jump II
• 2616. Minimize the Maximum Difference of Pairs

BFS/DFS

題目列表

• 98. Validate Binary Search Tree
• 100. Same Tree
• 101. Symmetric Tree
• 103. Binary Tree Zigzag Level Order Traversal
• 104. Maximum Depth of Binary Tree
• 111. Minimum Depth of Binary Tree
• 124. Binary Tree Maximum Path Sum
• 129. Sum Root to Leaf Numbers
• 133. Clone Graph
• 144. Binary Tree Preorder Traversal
• 207. Course Schedule
• 211. Design Add and Search Words Data Structure
• 226. Invert Binary Tree
• 399. Evaluate Division
• 472. Concatenated Words
• 530. Minimum Absolute Difference in BST
• 547. Number of Provinces
• 652. Find Duplicate Subtrees
• 662. Maximum Width of Binary Tree
• 687. Longest Univalue Path
• 783. Minimum Distance Between BST Nodes
• 787. Cheapest Flights Within K Stops
• 797. All Paths From Source to Target
• 802. Find Eventual Safe States
• 834. Sum of Distances in Tree
• 839. Similar String Groups
• 841. Keys and Rooms
• 872. Leaf-Similar Trees
• 886. Possible Bipartition
• 909. Snakes and Ladders
• 934. Shortest Bridge
• 938. Range Sum of BST
• 958. Check Completeness of a Binary Tree
• 1020. Number of Enclaves
• 1026. Maximum Difference Between Node and Ancestor
• 1091. Shortest Path in Binary Matrix
• 1129. Shortest Path with Alternating Colors
• 1161. Maximum Level Sum of a Binary Tree
• 1162. As Far from Land as Possible
• 1319. Number of Operations to Make Network Connected
• 1339. Maximum Product of Splitted Binary Tree
• 1345. Jump Game IV
• 1372. Longest ZigZag Path in a Binary Tree
• 1376. Time Needed to Inform All Employees
• 1443. Minimum Time to Collect All Apples in a Tree
• 1466. Reorder Routes to Make All Paths Lead to the City Zero
• 1519. Number of Nodes in the Sub-Tree With the Same Label
• 1926. Nearest Exit from Entrance in Maze
• 1971. Find if Path Exists in Graph
• 2101. Detonate the Maximum Bombs
• 2246. Longest Path With Different Adjacent Characters
• 2316. Count Unreachable Pairs of Nodes in an Undirected Graph
• 2328. Number of Increasing Paths in a Grid
• 2359. Find Closest Node to Given Two Nodes
• 2360. Longest Cycle in a Graph
• 2477. Minimum Fuel Cost to Report to the Capital
• 2492. Minimum Score of a Path Between Two Cities

Divide and Conquer

題目列表

• 23. Merge k Sorted Lists
• 109. Convert Sorted List to Binary Search Tree
• 347. Top K Frequent Elements
• 427. Construct Quad Tree
• 918. Maximum Sum Circular Subarray
• 1569. Number of Ways to Reorder Array to Get Same BST

Dynamic Programming

題目列表

• 45. Jump Game II
• 55. Jump Game
• 64. Minimum Path Sum
• 70. Climbing Stairs
• 72. Edit Distance
• 87. Scramble String
• 95. Unique Binary Search Trees II
• 121. Best Time to Buy and Sell Stock
• 122. Best Time to Buy and Sell Stock II
• 124. Binary Tree Maximum Path Sum
• 131. Palindrome Partitioning
• 139. Word Break
• 198. House Robber
• 279. Perfect Squares
• 309. Best Time to Buy and Sell Stock with Cooldown
• 435. Non-overlapping Intervals
• 446. Arithmetic Slices II - Subsequence
• 472. Concatenated Words
• 486. Predict the Winner
• 664. Strange Printer
• 673. Number of Longest Increasing Subsequence
• 688. Knight Probability in Chessboard
• 712. Minimum ASCII Delete Sum for Two Strings
• 714. Best Time to Buy and Sell Stock with Transaction Fee
• 787. Cheapest Flights Within K Stops
• 790. Domino and Tromino Tiling
• 808. Soup Servings
• 834. Sum of Distances in Tree
• 837. New 21 Game
• 877. Stone Game
• 879. Profitable Schemes
• 894. All Possible Full Binary Trees
• 907. Sum of Subarray Minimums
• 918. Maximum Sum Circular Subarray
• 920. Number of Music Playlists
• 926. Flip String to Monotone Increasing
• 931. Minimum Falling Path Sum
• 956. Tallest Billboard
• 983. Minimum Cost For Tickets
• 1027. Longest Arithmetic Subsequence
• 1125. Smallest Sufficient Team
• 1137. N-th Tribonacci Number
• 1140. Stone Game II
• 1143. Longest Common Subsequence
• 1162. As Far from Land as Possible
• 1187. Make Array Strictly Increasing
• 1218. Longest Arithmetic Subsequence of Given Difference
• 1235. Maximum Profit in Job Scheduling
• 1289. Minimum Falling Path Sum II
• 1312. Minimum Insertion Steps to Make a String Palindrome
• 1372. Longest ZigZag Path in a Binary Tree
• 1402. Reducing Dishes
• 1406. Stone Game III
• 1416. Restore The Array
• 1444. Number of Ways of Cutting a Pizza
• 1493. Longest Subarray of 1's After Deleting One Element
• 1547. Minimum Cost to Cut a Stick
• 1569. Number of Ways to Reorder Array to Get Same BST
• 1575. Count All Possible Routes
• 1626. Best Team With No Conflicts
• 1639. Number of Ways to Form a Target String Given a Dictionary
• 1751. Maximum Number of Events That Can Be Attended II
• 1799. Maximize Score After N Operations
• 1857. Largest Color Value in a Directed Graph
• 2140. Solving Questions With Brainpower
• 2218. Maximum Value of K Coins From Piles
• 2272. Substring With Largest Variance
• 2305. Fair Distribution of Cookies
• 2328. Number of Increasing Paths in a Grid
• 2439. Minimize Maximum of Array
• 2466. Count Ways To Build Good Strings

Graph

題目列表

• 133. Clone Graph
• 207. Course Schedule
• 399. Evaluate Division
• 547. Number of Provinces
• 787. Cheapest Flights Within K Stops
• 797. All Paths From Source to Target
• 802. Find Eventual Safe States
• 834. Sum of Distances in Tree
• 841. Keys and Rooms
• 886. Possible Bipartition
• 997. Find the Town Judge
• 1129. Shortest Path with Alternating Colors
• 1319. Number of Operations to Make Network Connected
• 1466. Reorder Routes to Make All Paths Lead to the City Zero
• 1514. Path with Maximum Probability
• 1557. Minimum Number of Vertices to Reach All Nodes
• 1579. Remove Max Number of Edges to Keep Graph Fully Traversable
• 1697. Checking Existence of Edge Length Limited Paths
• 1857. Largest Color Value in a Directed Graph
• 1971. Find if Path Exists in Graph
• 2101. Detonate the Maximum Bombs
• 2246. Longest Path With Different Adjacent Characters
• 2316. Count Unreachable Pairs of Nodes in an Undirected Graph
• 2328. Number of Increasing Paths in a Grid
• 2359. Find Closest Node to Given Two Nodes
• 2360. Longest Cycle in a Graph
• 2421. Number of Good Paths
• 2477. Minimum Fuel Cost to Report to the Capital
• 2492. Minimum Score of a Path Between Two Cities