_sidebar.md

• 🏠 Home

• Easy

  • 100. Same Tree
  • 101. Symmetric Tree
  • 136. Single Number
  • 145. Binary Tree Postorder Traversal
  • 155. Min Stack
    • hashmap
  • 219. Contains Duplicate II
    • hashmap
    • slidingwindow
  • 222. Count Complete Tree Nodes
  • 350. Intersection of Two Arrays II
  • 495. Teemo Attacking
  • 590. N ary Tree Postorder Traversal
  • 594. Longest Harmonious Subsequence
  • 628. Maximum Product of Three Numbers
  • 860. Lemonade Change
  • 884. Uncommon Words from Two Sentences
  • 1021. Remove Outermost Parentheses
  • 1189. Maximum Number of Balloons
  • 1260. Shift 2D Grid
  • 1331. Rank Transform of an Array
  • 1399. Count Largest Group
  • 1455. Check If A Word Occurs As A Prefix Of Any Word In A Sentence
  • 1464. Maximum Product of Two Elements in an Array
  • 1475. Final Prices With A Special Discount In A Shop
  • 1486. XOR Operation in an Array
  • 1518. Water Bottles
  • 1539. Kth Missing Positive Number
  • 1550. Three Consecutive Odds
  • 1598. Crawler Log Folder
    • cpp
  • 1636. Sort Array By Increasing Frequency
  • 1684. Count The Number Of Consistent Strings
  • 1945. Sum of Digits of String After Convert
  • 1967. Number of Strings That Appear as Substrings in Word
  • 1979. Find Greatest Common Divisor of Array
  • 2022. Convert 1D Array Into 2D Array
  • 2053. Kth Distinct String in an Array
  • 2094. Finding 3 Digit Even Numbers
  • 2191. Sort the Jumbled Numbers
  • 2418. Sort the People
  • 2558. Take Gifts From The Richest Pile
  • 2582. Passing The Pillow
    • rust
  • 2696. Minimum String Length After Removing Substrings
  • 2996. Smallest Missing Integer Greater Than Sequential Prefix Sum
  • 3069. Distribute Elements Into Two Arrays I
  • 3090. Maximum Length Substring With Two Occurrences
  • 3216. Lexicographically Smallest String After a Swap
  • 3314. Construct the Minimum Bitwise Array I
  • 3375. Minimum Operations to Make Array Values Equal to k
  • 3471. Find the Largest Almost Missing Integer
  • 3483. Unique 3 Digit Even Numbers
  • 3498. Reverse Degree of a String
  • 3536. Maximum Product of Two Digits
  • 3622. Check Divisibility by Digit Sum and Product
  • 3637. Trionic Array I
  • 3658. GCD of Odd and Even Sums
  • 3718. Smallest Missing Multiple of K
  • 3731. Find Missing Elements
  • 3754. Concatenate Non Zero Digits and Multiply by Sum I
  • 3870. Count Commas in Range
  • 3875. Construct Uniform Parity Array I
  • 3903. Smallest Stable Index I

• Medium

  • 33. Search in rotated sorted array
  • 40. Combination Sum II
  • 63. Unique Paths II
  • 81. Search In Rotated Sorted Array
  • 122-Best-Time-to-Buy-and-Sell-Stock-II. 122 Best Time to Buy and Sell Stock II
  • 128. Longest Consecutive Sequence
  • 155. Min Stack
  • 179. Largest number
  • 208. Implement trie (prefix tree)
  • 209. Minimum Size Subarray Sum
  • 238. Product of Array Except Self
  • 241. Different Ways to Add Parentheses
  • 264. Ugly Number II
  • 300. Longest Increasing Subsequence
    • bottomup
    • greedy-patience-sort
    • topdown
  • 307. Range sum query Mutable
  • 486. Predict the Winner
  • 539. Minimum Time Difference
  • 567. Permutation in String
  • 624. Maximum Distance in Arrays
  • 654. Maximum Binary Tree
  • 725. Split Linked List in Parts
  • 729. My Calendar I
  • 739. Daily Temperatures
  • 763. Partition Labels
  • 790. Domino and Tromino Tiling
  • 807. Max Increase to Keep City Skyline
  • 826. Most Profit Assigning Work
  • 840. Magic Squares In Grid
  • 853. Car Fleet
  • 874. Walking Robot Simulation
  • 875. KoKo Eating Bananas
  • 877. Stone Game
  • 885. Spiral Matrix III
  • 921. Minimum Add To Make Parentheses Valid
  • 947. Most Stones Removed with Same Row or Column
  • 959. Regions Cut By Slashes
  • 981. Time Based Key Value Store
  • 1014. Best Sightseeing Pair
  • 1038. Binary Search Tree to Greater Sum Tree
  • 1052. Grumpy Bookstore Owner
  • 1081. Smallest Subsequence of Distinct Characters
  • 1110. Delete Nodes And Return Forest
  • 1140. Stone Game II
  • 1190. Reverse Substrings Between Each Pair Of Parentheses
  • 1261. Find Elements in a Contaminated Binary Tree
  • 1288. Remove Covered Intervals
  • 1291. Sequential Digits
  • 1310. XOR Queries of a Subarray
  • 1371. Find the Longest Substring Containing Vowels in Even Counts
  • 1382. Balance A Binary Search Tree
  • 1386. Cinema Seat Allocation
  • 1395. Count Number of Teams
  • 1438. Longest Continuous Subarray With Absolute Diff Less Than or Equal to Limit
  • 1482. Minimum number of days to make m bouquets
  • 1497. Check If Array Pairs Are Divisible by k
  • 1530. Number of Good Leaf Nodes Pairs
  • 1552. Magnetic Force Between Two Balls
  • 1593. Split a String Into the Max Number of Unique Substrings
  • 1605. Find Valid Matrix Given Row and Column Sums
  • 1653. Minimum Deletions to Make String Balanced
  • 1701. Average Waiting Time
  • 1717. Maximum Score From Removing Substrings
  • 1760. Minimum Limit Of Balls In A Bag
  • 1823. Find The Winner Of The Circular Game
  • 1833. Maximum Ice Cream Bars
  • 1846. Maximum Element After Decreasing and Rearranging
  • 1894. Find the Student that Will Replace the Chalk
  • 1905. Count Sub Islands
    • cpp
    • go
    • java
  • 1922. Count Good Numbers
  • 1927. Sum Game
  • 1942. The Number of the Smallest Unoccupied Chair
  • 1963. Minimum Number of Swaps to Make the String Balanced
  • 1975. Maxium Matrix Sum
  • 2028. Find Missing Observations
  • 2058. Find the Minimum and Maximum Number of Nodes Between Critical Points
  • 2070. Most Beautiful Item for Each Query
  • 2091. Removing Minimum and Maximum From Array
  • 2096. Step By Step Directions From A Binary Tree Node To Another
    • go
  • 2109. Adding Spaces To A String
  • 2161. Partition Array According to Given Pivot
  • 2181. Merge Nodes in Between Zeros
  • 2182. Construct string with repeat limit
  • 2192. All Ancestor of a Node in a Directed Acyclic Graph
  • 2196. Create Binary Tree From Descriptions
    • cpp
    • go
    • java
    • rust
  • 2226. Maximum candies allocate to K children
  • 2265. Count Nodes Equal to Average of Subtree
  • 2270. Number Of Ways To Split Array
  • 2285. Maximum Total Importance of Roads
  • 2326. Spiral Matrix IV
  • 2337. Move Pieces to Obtain a String
  • 2419. Longest Subarray With Maximum Bitwise AND
  • 2461. Maximum Sum of Distinct Subarrays With Length K
  • 2491. Divide Players Into Teams of Equal Skill
  • 2492. Minimum Score of a Path Between Two Cities
  • 2501. Longest Square Streak in an Array
  • 2583. Kth Largest Sum in a Binary Tree
  • 2601. Prime Subtraction Operation
  • 2685. Count the Number of Complete Components
  • 2707. Extra Characters In A String
  • 2779. Maximum Beauty Of An Array After Applying Operation
  • 2825. Make String a Subsequence Using Cyclic Increments
  • 2904. Shortest and Lexicographically Smallest Beautiful String
  • 2924. Find Champion II
  • 2958. Length of Longest Subarray With at Most K Frequency
  • 3016. Minimum Number of Pushes to Type Word II
  • 3020. Find the Maximum Number of Elements in Subset
  • 3043. Find the Length of the Longest Common Prefix
  • 3097. Shortest Subarray With OR at Least K II
  • 3217. Delete Nodes From Linked List Present in Array
  • 3218. Minimum Cost for Cutting Cake I
  • 3254. Find the Power of K Size Subarrays I
  • 3286. Find a Safe Walk Through a Grid
  • 3310. Remove Methods From Project
  • 3499. Maximize Active Section with Trade I
  • 3513. Number of Unique XOR Triplets I
  • 3514. Number of Unique XOR Triplets II
  • 3517. Smallest Palindromic Rearrangement I
  • 3532. Path Existence Queries in a Graph I
  • 3568. Minimum Moves to Clean the Classroom
  • 3702. Longest Subsequence With Non Zero Bitwise XOR
  • 3756. Concatenate Non Zero Digits and Multiply by Sum II
  • 3867. Sum of GCD of Formed Pairs
  • 3871. Count Commas in Range II
  • 3876. Construct Uniform Parity Array II
  • 3904. Smallest Stable Index II

• Hard

  • 11. Container With Most Water
  • 23. Merge k Sorted Lists
  • 37. Sudoku Solver
  • 41. First Missing Positive
  • 115. Distinct Subsequences
  • 188. Best Time to Buy and Sell Stock IV
  • 212. Word Search II
  • 214. Shortest Palindrome
  • 239. Sliding Window Maximum
  • 295. Find Median from Data Stream
  • 502. IPO
  • 664. Strange Printer
  • 719. Find K th Smallest Pair Distance
  • 726. Number of Atoms
  • 773. Sliding Puzzle
  • 862. Shortest Subarray with Sum at Least K
  • 940. Distinct Subsequences II
  • 995. Minimum Number of K Consecutive Bit Flips
  • 1106. Parsing A Boolean Expression
  • 1301. Number of Paths with Max Score
  • 1510. Stone Game IV
  • 1579. Remove Max Number of Edges to Keep Graph Fully Traversable
  • 1872. Stone Game VIII
  • 2071. Maximum Number of Tasks You Can Assign
  • 2302. Count Subarrays With Score Less Than K
  • 2392. Build a Matrix With Conditions
  • 2416. Sum of Prefix Scores of Strings
  • 2503. Maximum Number of Points From Grid Queries
  • 2551. Put Marbles in Bags
  • 2751. Robot Collisions
  • 3219. Minimum Cost for Cutting Cake II
  • 3336. Find the Number of Subsequences With Equal GCD
  • 3363. Find the Maximum Number of Fruits Collected
  • 3534. Path Existence Queries in a Graph II
  • 3620. Network Recovery Pathways
  • 3739. Count Subarrays With Majority Element II