Recursion
Backtracking¶
- 3437. Permutations III
- 3376. Minimum Time to Break Locks I
- 3348. Smallest Divisible Digit Product II
- 3211. Generate Binary Strings Without Adjacent Zeros
- 2992. Number of Self-Divisible Permutations
- 2767. Partition String Into Minimum Beautiful Substrings
- 2708. Maximum Strength of a Group
- 2698. Find the Punishment Number of an Integer
- 2664. The Knightâs Tour
- 2597. The Number of Beautiful Subsets
- 2397. Maximum Rows Covered by Columns
- 2375. Construct Smallest Number From DI String
- 2305. Fair Distribution of Cookies
- 2212. Maximum Points in an Archery Competition
- 2178. Maximum Split of Positive Even Integers
- 2152. Minimum Number of Lines to Cover Points
- 2151. Maximum Good People Based on Statements
- 2065. Maximum Path Quality of a Graph
- 2056. Number of Valid Move Combinations On Chessboard
- 2048. Next Greater Numerically Balanced Number
- 2044. Count Number of Maximum Bitwise-OR Subsets
- 2014. Longest Subsequence Repeated k Times
- 2002. Maximum Product of the Length of Two Palindromic Subsequences
- 1986. Minimum Number of Work Sessions to Finish the Tasks
- 1980. Find Unique Binary String
- 1947. Maximum Compatibility Score Sum
- 1863. Sum of All Subset XOR Totals
- 1849. Splitting a String Into Descending Consecutive Values
- 1799. Maximize Score After N Operations
- 1774. Closest Dessert Cost
- 1723. Find Minimum Time to Finish All Jobs
- 1718. Construct the Lexicographically Largest Valid Sequence
- 1655. Distribute Repeating Integers
- 1601. Maximum Number of Achievable Transfer Requests
- 1593. Split a String Into the Max Number of Unique Substrings
- 1467. Probability of a Two Boxes Having The Same Number of Distinct Balls
- 1415. The k-th Lexicographical String of All Happy Strings of Length n
- 1307. Verbal Arithmetic Puzzle
- 1286. Iterator for Combination
- 1258. Synonymous Sentences
- 1255. Maximum Score Words Formed by Letters
- 1240. Tiling a Rectangle with the Fewest Squares
- 1239. Maximum Length of a Concatenated String with Unique Characters
- 1238. Circular Permutation in Binary Representation
- 1219. Path with Maximum Gold
- 1215. Stepping Numbers
- 1096. Brace Expansion II
- 1088. Confusing Number II
- 1087. Brace Expansion
- 1079. Letter Tile Possibilities
- 1066. Campus Bikes II
- 996. Number of Squareful Arrays
- 988. Smallest String Starting From Leaf
- 980. Unique Paths III
- 967. Numbers With Same Consecutive Differences
- 949. Largest Time for Given Digits
- 842. Split Array into Fibonacci Sequence
- 816. Ambiguous Coordinates
- 797. All Paths From Source to Target
- 784. Letter Case Permutation
- 773. Sliding Puzzle
- 698. Partition to K Equal Sum Subsets
- 691. Stickers to Spell Word
- 681. Next Closest Time
- 679. 24 Game
- 638. Shopping Offers
- 526. Beautiful Arrangement
- 494. Target Sum
- 491. Non-decreasing Subsequences
- 489. Robot Room Cleaner
- 473. Matchsticks to Square
- 465. Optimal Account Balancing
- 425. Word Squares
- 411. Minimum Unique Word Abbreviation
- 401. Binary Watch
- 357. Count Numbers with Unique Digits
- 351. Android Unlock Patterns
- 320. Generalized Abbreviation
- 306. Additive Number
- 301. Remove Invalid Parentheses
- 294. Flip Game II
- 291. Word Pattern II
- 282. Expression Add Operators
- 267. Palindrome Permutation II
- 257. Binary Tree Paths
- 254. Factor Combinations
- 216. Combination Sum III
- 212. Word Search II
- 140. Word Break II
- 131. Palindrome Partitioning
- 126. Word Ladder II
- 113. Path Sum II
- 95. Unique Binary Search Trees II
- 93. Restore IP Addresses
- 90. Subsets II
- 89. Gray Code
- 79. Word Search
- 78. Subsets
- 77. Combinations
- 52. N-Queens II
- 51. N-Queens
- 47. Permutations II
- 46. Permutations
- 40. Combination Sum II
- 39. Combination Sum
- 37. Sudoku Solver
- 22. Generate Parentheses
- 17. Letter Combinations of a Phone Number
Divide and Conquer¶
- 3165. Maximum Sum of Subsequence With Non-adjacent Elements
- 3109. Find the Index of Permutation
- 2792. Count Nodes That Are Great Enough
- 2613. Beautiful Pairs
- 2519. Count the Number of K-Big Indices
- 2426. Number of Pairs Satisfying Inequality
- 2407. Longest Increasing Subsequence II
- 2343. Query Kth Smallest Trimmed Number
- 2179. Count Good Triplets in an Array
- 2031. Count Subarrays With More Ones Than Zeros
- 1985. Find the Kth Largest Integer in the Array
- 1982. Find Array Given Subset Sums
- 1763. Longest Nice Substring
- 1738. Find Kth Largest XOR Coordinate Value
- 1649. Create Sorted Array through Instructions
- 1569. Number of Ways to Reorder Array to Get Same BST
- 1382. Balance a Binary Search Tree
- 1274. Number of Ships in a Rectangle
- 973. K Closest Points to Origin
- 932. Beautiful Array
- 918. Maximum Sum Circular Subarray
- 912. Sort an Array
- 889. Construct Binary Tree from Preorder and Postorder Traversal
- 654. Maximum Binary Tree
- 558. Logical OR of Two Binary Grids Represented as Quad-Trees
- 493. Reverse Pairs
- 427. Construct Quad Tree
- 395. Longest Substring with At Least K Repeating Characters
- 372. Super Pow
- 347. Top K Frequent Elements
- 327. Count of Range Sum
- 324. Wiggle Sort II
- 315. Count of Smaller Numbers After Self
- 240. Search a 2D Matrix II
- 218. The Skyline Problem
- 215. Kth Largest Element in an Array
- 191. Number of 1 Bits
- 190. Reverse Bits
- 169. Majority Element
- 148. Sort List
- 109. Convert Sorted List to Binary Search Tree
- 108. Convert Sorted Array to Binary Search Tree
- 106. Construct Binary Tree from Inorder and Postorder Traversal
- 105. Construct Binary Tree from Preorder and Inorder Traversal
- 53. Maximum Subarray
- 23. Merge k Sorted Lists
- 4. Median of Two Sorted Arrays
Recursion¶
- 3483. Unique 3-Digit Even Numbers
- 3307. Find the K-th Character in String Game II
- 3304. Find the K-th Character in String Game I
- 2550. Count Collisions of Monkeys on a Polygon
- 2487. Remove Nodes From Linked List
- 1969. Minimum Non-Zero Product of the Array Elements
- 1922. Count Good Numbers
- 1823. Find the Winner of the Circular Game
- 1808. Maximize Number of Nice Divisors
- 1545. Find Kth Bit in Nth Binary String
- 1265. Print Immutable Linked List in Reverse
- 1106. Parsing A Boolean Expression
- 894. All Possible Full Binary Trees
- 779. K-th Symbol in Grammar
- 776. Split BST
- 772. Basic Calculator III
- 770. Basic Calculator IV
- 761. Special Binary String
- 736. Parse Lisp Expression
- 544. Output Contest Matches
- 509. Fibonacci Number
- 486. Predict the Winner
- 439. Ternary Expression Parser
- 394. Decode String
- 390. Elimination Game
- 342. Power of Four
- 326. Power of Three
- 273. Integer to English Words
- 255. Verify Preorder Sequence in Binary Search Tree
- 248. Strobogrammatic Number III
- 247. Strobogrammatic Number II
- 241. Different Ways to Add Parentheses
- 234. Palindrome Linked List
- 233. Number of Digit One
- 231. Power of Two
- 224. Basic Calculator
- 206. Reverse Linked List
- 203. Remove Linked List Elements
- 143. Reorder List
- 60. Permutation Sequence
- 50. Pow(x, n)
- 44. Wildcard Matching
- 25. Reverse Nodes in k-Group
- 24. Swap Nodes in Pairs
- 21. Merge Two Sorted Lists
- 10. Regular Expression Matching
- 2. Add Two Numbers