← back

NeetCode Editorials

953 questions · 0 seen · leetcode.com

All 953 problems with a NeetCode video or written editorial

Actions

⊣ Practice
⊣ Quiz

Problems

⊣ 1 Two Sum
⊣ 2 Add Two Numbers
⊣ 3 Longest Substring Without Repeating Characters
⊣ 4 Median of Two Sorted Arrays
⊣ 5 Longest Palindromic Substring
⊣ 6 Zigzag Conversion
⊣ 7 Reverse Integer
⊣ 9 Palindrome Number
⊣ 10 Regular Expression Matching
⊣ 11 Container With Most Water
⊣ 12 Integer to Roman
⊣ 13 Roman to Integer
⊣ 14 Longest Common Prefix
⊣ 15 3Sum
⊣ 17 Letter Combinations of a Phone Number
⊣ 18 4Sum
⊣ 19 Remove Nth Node From End of List
⊣ 20 Valid Parentheses
⊣ 21 Merge Two Sorted Lists
⊣ 22 Generate Parentheses
⊣ 23 Merge k Sorted Lists
⊣ 24 Swap Nodes in Pairs
⊣ 25 Reverse Nodes in k-Group
⊣ 26 Remove Duplicates from Sorted Array
⊣ 27 Remove Element
⊣ 28 Find the Index of the First Occurrence in a String
⊣ 31 Next Permutation
⊣ 33 Search in Rotated Sorted Array
⊣ 34 Find First and Last Position of Element in Sorted Array
⊣ 35 Search Insert Position
⊣ 36 Valid Sudoku
⊣ 39 Combination Sum
⊣ 40 Combination Sum II
⊣ 41 First Missing Positive
⊣ 42 Trapping Rain Water
⊣ 43 Multiply Strings
⊣ 45 Jump Game II
⊣ 46 Permutations
⊣ 47 Permutations II
⊣ 48 Rotate Image
⊣ 49 Group Anagrams
⊣ 50 Pow(x, n)
⊣ 51 N-Queens
⊣ 52 N-Queens II
⊣ 53 Maximum Subarray
⊣ 54 Spiral Matrix
⊣ 55 Jump Game
⊣ 56 Merge Intervals
⊣ 57 Insert Interval
⊣ 58 Length of Last Word
⊣ 59 Spiral Matrix II
⊣ 61 Rotate List
⊣ 62 Unique Paths
⊣ 63 Unique Paths II
⊣ 64 Minimum Path Sum
⊣ 66 Plus One
⊣ 67 Add Binary
⊣ 68 Text Justification
⊣ 69 Sqrt(x)
⊣ 70 Climbing Stairs
⊣ 71 Simplify Path
⊣ 72 Edit Distance
⊣ 73 Set Matrix Zeroes
⊣ 74 Search a 2D Matrix
⊣ 75 Sort Colors
⊣ 76 Minimum Window Substring
⊣ 77 Combinations
⊣ 78 Subsets
⊣ 79 Word Search
⊣ 80 Remove Duplicates from Sorted Array II
⊣ 81 Search in Rotated Sorted Array II
⊣ 83 Remove Duplicates from Sorted List
⊣ 84 Largest Rectangle in Histogram
⊣ 86 Partition List
⊣ 88 Merge Sorted Array
⊣ 90 Subsets II
⊣ 91 Decode Ways
⊣ 92 Reverse Linked List II
⊣ 93 Restore IP Addresses
⊣ 94 Binary Tree Inorder Traversal
⊣ 95 Unique Binary Search Trees II
⊣ 96 Unique Binary Search Trees
⊣ 97 Interleaving String
⊣ 98 Validate Binary Search Tree
⊣ 99 Recover Binary Search Tree
⊣ 100 Same Tree
⊣ 101 Symmetric Tree
⊣ 102 Binary Tree Level Order Traversal
⊣ 103 Binary Tree Zigzag Level Order Traversal
⊣ 104 Maximum Depth of Binary Tree
⊣ 105 Construct Binary Tree from Preorder and Inorder Traversal
⊣ 106 Construct Binary Tree from Inorder and Postorder Traversal
⊣ 108 Convert Sorted Array to Binary Search Tree
⊣ 110 Balanced Binary Tree
⊣ 112 Path Sum
⊣ 115 Distinct Subsequences
⊣ 116 Populating Next Right Pointers in Each Node
⊣ 118 Pascal's Triangle
⊣ 119 Pascal's Triangle II
⊣ 120 Triangle
⊣ 121 Best Time to Buy and Sell Stock
⊣ 122 Best Time to Buy and Sell Stock II
⊣ 124 Binary Tree Maximum Path Sum
⊣ 125 Valid Palindrome
⊣ 127 Word Ladder
⊣ 128 Longest Consecutive Sequence
⊣ 129 Sum Root to Leaf Numbers
⊣ 130 Surrounded Regions
⊣ 131 Palindrome Partitioning
⊣ 133 Clone Graph
⊣ 134 Gas Station
⊣ 135 Candy
⊣ 136 Single Number
⊣ 138 Copy List with Random Pointer
⊣ 139 Word Break
⊣ 140 Word Break II
⊣ 141 Linked List Cycle
⊣ 143 Reorder List
⊣ 144 Binary Tree Preorder Traversal
⊣ 145 Binary Tree Postorder Traversal
⊣ 146 LRU Cache
⊣ 147 Insertion Sort List
⊣ 148 Sort List
⊣ 149 Max Points on a Line
⊣ 150 Evaluate Reverse Polish Notation
⊣ 152 Maximum Product Subarray
⊣ 153 Find Minimum in Rotated Sorted Array
⊣ 155 Min Stack
⊣ 160 Intersection of Two Linked Lists
⊣ 162 Find Peak Element
⊣ 167 Two Sum II - Input Array Is Sorted
⊣ 168 Excel Sheet Column Title
⊣ 169 Majority Element
⊣ 173 Binary Search Tree Iterator
⊣ 179 Largest Number
⊣ 187 Repeated DNA Sequences
⊣ 189 Rotate Array
⊣ 190 Reverse Bits
⊣ 191 Number of 1 Bits
⊣ 198 House Robber
⊣ 199 Binary Tree Right Side View
⊣ 200 Number of Islands
⊣ 201 Bitwise AND of Numbers Range
⊣ 202 Happy Number
⊣ 203 Remove Linked List Elements
⊣ 204 Count Primes
⊣ 205 Isomorphic Strings
⊣ 206 Reverse Linked List
⊣ 207 Course Schedule
⊣ 208 Implement Trie (Prefix Tree)
⊣ 209 Minimum Size Subarray Sum
⊣ 210 Course Schedule II
⊣ 211 Design Add and Search Words Data Structure
⊣ 212 Word Search II
⊣ 213 House Robber II
⊣ 214 Shortest Palindrome
⊣ 215 Kth Largest Element in an Array
⊣ 217 Contains Duplicate
⊣ 219 Contains Duplicate II
⊣ 221 Maximal Square
⊣ 225 Implement Stack using Queues
⊣ 226 Invert Binary Tree
⊣ 227 Basic Calculator II
⊣ 229 Majority Element II
⊣ 230 Kth Smallest Element in a BST
⊣ 231 Power of Two
⊣ 232 Implement Queue using Stacks
⊣ 234 Palindrome Linked List
⊣ 235 Lowest Common Ancestor of a Binary Search Tree
⊣ 236 Lowest Common Ancestor of a Binary Tree
⊣ 238 Product of Array Except Self
⊣ 239 Sliding Window Maximum
⊣ 241 Different Ways to Add Parentheses
⊣ 242 Valid Anagram
⊣ 260 Single Number III
⊣ 263 Ugly Number
⊣ 264 Ugly Number II
⊣ 268 Missing Number
⊣ 273 Integer to English Words
⊣ 279 Perfect Squares
⊣ 283 Move Zeroes
⊣ 287 Find the Duplicate Number
⊣ 290 Word Pattern
⊣ 295 Find Median from Data Stream
⊣ 297 Serialize and Deserialize Binary Tree
⊣ 300 Longest Increasing Subsequence
⊣ 303 Range Sum Query - Immutable
⊣ 304 Range Sum Query 2D - Immutable
⊣ 309 Best Time to Buy and Sell Stock with Cooldown
⊣ 310 Minimum Height Trees
⊣ 312 Burst Balloons
⊣ 322 Coin Change
⊣ 329 Longest Increasing Path in a Matrix
⊣ 332 Reconstruct Itinerary
⊣ 337 House Robber III
⊣ 338 Counting Bits
⊣ 341 Flatten Nested List Iterator
⊣ 342 Power of Four
⊣ 343 Integer Break
⊣ 344 Reverse String
⊣ 347 Top K Frequent Elements
⊣ 349 Intersection of Two Arrays
⊣ 352 Data Stream as Disjoint Intervals
⊣ 354 Russian Doll Envelopes
⊣ 355 Design Twitter
⊣ 367 Valid Perfect Square
⊣ 368 Largest Divisible Subset
⊣ 371 Sum of Two Integers
⊣ 374 Guess Number Higher or Lower
⊣ 377 Combination Sum IV
⊣ 380 Insert Delete GetRandom O(1)
⊣ 383 Ransom Note
⊣ 386 Lexicographical Numbers
⊣ 387 First Unique Character in a String
⊣ 389 Find the Difference
⊣ 392 Is Subsequence
⊣ 394 Decode String
⊣ 399 Evaluate Division
⊣ 402 Remove K Digits
⊣ 407 Trapping Rain Water II
⊣ 409 Longest Palindrome
⊣ 410 Split Array Largest Sum
⊣ 416 Partition Equal Subset Sum
⊣ 417 Pacific Atlantic Water Flow
⊣ 424 Longest Repeating Character Replacement
⊣ 427 Construct Quad Tree
⊣ 435 Non-overlapping Intervals
⊣ 438 Find All Anagrams in a String
⊣ 440 K-th Smallest in Lexicographical Order
⊣ 441 Arranging Coins
⊣ 442 Find All Duplicates in an Array
⊣ 443 String Compression
⊣ 445 Add Two Numbers II
⊣ 446 Arithmetic Slices II - Subsequence
⊣ 448 Find All Numbers Disappeared in an Array
⊣ 450 Delete Node in a BST
⊣ 451 Sort Characters By Frequency
⊣ 452 Minimum Number of Arrows to Burst Balloons
⊣ 455 Assign Cookies
⊣ 456 132 Pattern
⊣ 460 LFU Cache
⊣ 463 Island Perimeter
⊣ 472 Concatenated Words
⊣ 473 Matchsticks to Square
⊣ 474 Ones and Zeroes
⊣ 485 Max Consecutive Ones
⊣ 494 Target Sum
⊣ 496 Next Greater Element I
⊣ 502 IPO
⊣ 513 Find Bottom Left Tree Value
⊣ 514 Freedom Trail
⊣ 515 Find Largest Value in Each Tree Row
⊣ 516 Longest Palindromic Subsequence
⊣ 518 Coin Change II
⊣ 523 Continuous Subarray Sum
⊣ 525 Contiguous Array
⊣ 528 Random Pick with Weight
⊣ 535 Encode and Decode TinyURL
⊣ 538 Convert BST to Greater Tree
⊣ 539 Minimum Time Difference
⊣ 540 Single Element in a Sorted Array
⊣ 543 Diameter of Binary Tree
⊣ 547 Number of Provinces
⊣ 552 Student Attendance Record II
⊣ 554 Brick Wall
⊣ 557 Reverse Words in a String III
⊣ 560 Subarray Sum Equals K
⊣ 567 Permutation in String
⊣ 572 Subtree of Another Tree
⊣ 576 Out of Boundary Paths
⊣ 590 N-ary Tree Postorder Traversal
⊣ 605 Can Place Flowers
⊣ 606 Construct String from Binary Tree
⊣ 617 Merge Two Binary Trees
⊣ 621 Task Scheduler
⊣ 622 Design Circular Queue
⊣ 624 Maximum Distance in Arrays (PRO)
⊣ 629 K Inverse Pairs Array
⊣ 632 Smallest Range Covering Elements from K Lists
⊣ 633 Sum of Square Numbers
⊣ 645 Set Mismatch
⊣ 646 Maximum Length of Pair Chain
⊣ 647 Palindromic Substrings
⊣ 649 Dota2 Senate
⊣ 650 2 Keys Keyboard
⊣ 652 Find Duplicate Subtrees
⊣ 658 Find K Closest Elements
⊣ 661 Image Smoother
⊣ 662 Maximum Width of Binary Tree
⊣ 665 Non-decreasing Array
⊣ 669 Trim a Binary Search Tree
⊣ 670 Maximum Swap
⊣ 673 Number of Longest Increasing Subsequence
⊣ 678 Valid Parenthesis String
⊣ 680 Valid Palindrome II
⊣ 682 Baseball Game
⊣ 684 Redundant Connection
⊣ 689 Maximum Sum of 3 Non-Overlapping Subarrays
⊣ 691 Stickers to Spell Word
⊣ 695 Max Area of Island
⊣ 698 Partition to K Equal Sum Subsets
⊣ 701 Insert into a Binary Search Tree
⊣ 703 Kth Largest Element in a Stream
⊣ 704 Binary Search
⊣ 705 Design HashSet
⊣ 706 Design HashMap
⊣ 707 Design Linked List
⊣ 713 Subarray Product Less Than K
⊣ 719 Find K-th Smallest Pair Distance
⊣ 721 Accounts Merge
⊣ 724 Find Pivot Index
⊣ 725 Split Linked List in Parts
⊣ 726 Number of Atoms
⊣ 729 My Calendar I
⊣ 731 My Calendar II
⊣ 733 Flood Fill
⊣ 735 Asteroid Collision
⊣ 739 Daily Temperatures
⊣ 740 Delete and Earn
⊣ 741 Cherry Pickup
⊣ 743 Network Delay Time
⊣ 746 Min Cost Climbing Stairs
⊣ 752 Open the Lock
⊣ 763 Partition Labels
⊣ 767 Reorganize String
⊣ 769 Max Chunks To Make Sorted
⊣ 773 Sliding Puzzle
⊣ 778 Swim in Rising Water
⊣ 779 K-th Symbol in Grammar
⊣ 783 Minimum Distance Between BST Nodes
⊣ 785 Is Graph Bipartite?
⊣ 787 Cheapest Flights Within K Stops
⊣ 791 Custom Sort String
⊣ 799 Champagne Tower
⊣ 802 Find Eventual Safe States
⊣ 805 Split Array With Same Average
⊣ 815 Bus Routes
⊣ 827 Making A Large Island
⊣ 837 New 21 Game
⊣ 838 Push Dominoes
⊣ 840 Magic Squares In Grid
⊣ 844 Backspace String Compare
⊣ 846 Hand of Straights
⊣ 853 Car Fleet
⊣ 857 Minimum Cost to Hire K Workers
⊣ 860 Lemonade Change
⊣ 861 Score After Flipping Matrix
⊣ 862 Shortest Subarray with Sum at Least K
⊣ 867 Transpose Matrix
⊣ 872 Leaf-Similar Trees
⊣ 873 Length of Longest Fibonacci Subsequence
⊣ 874 Walking Robot Simulation
⊣ 875 Koko Eating Bananas
⊣ 876 Middle of the Linked List
⊣ 877 Stone Game
⊣ 879 Profitable Schemes
⊣ 881 Boats to Save People
⊣ 884 Uncommon Words from Two Sentences
⊣ 885 Spiral Matrix III
⊣ 889 Construct Binary Tree from Preorder and Postorder Traversal
⊣ 894 All Possible Full Binary Trees
⊣ 895 Maximum Frequency Stack
⊣ 896 Monotonic Array
⊣ 901 Online Stock Span
⊣ 904 Fruit Into Baskets
⊣ 905 Sort Array By Parity
⊣ 907 Sum of Subarray Minimums
⊣ 909 Snakes and Ladders
⊣ 912 Sort an Array
⊣ 916 Word Subsets
⊣ 918 Maximum Sum Circular Subarray
⊣ 920 Number of Music Playlists
⊣ 921 Minimum Add to Make Parentheses Valid
⊣ 926 Flip String to Monotone Increasing
⊣ 929 Unique Email Addresses
⊣ 930 Binary Subarrays With Sum
⊣ 931 Minimum Falling Path Sum
⊣ 934 Shortest Bridge
⊣ 935 Knight Dialer
⊣ 938 Range Sum of BST
⊣ 945 Minimum Increment to Make Array Unique
⊣ 946 Validate Stack Sequences
⊣ 948 Bag of Tokens
⊣ 950 Reveal Cards In Increasing Order
⊣ 951 Flip Equivalent Binary Trees
⊣ 953 Verifying an Alien Dictionary
⊣ 958 Check Completeness of a Binary Tree
⊣ 959 Regions Cut By Slashes
⊣ 962 Maximum Width Ramp
⊣ 973 K Closest Points to Origin
⊣ 974 Subarray Sums Divisible by K
⊣ 977 Squares of a Sorted Array
⊣ 978 Longest Turbulent Subarray
⊣ 979 Distribute Coins in Binary Tree
⊣ 981 Time Based Key-Value Store
⊣ 983 Minimum Cost For Tickets
⊣ 986 Interval List Intersections
⊣ 988 Smallest String Starting From Leaf
⊣ 989 Add to Array-Form of Integer
⊣ 992 Subarrays with K Different Integers
⊣ 994 Rotting Oranges
⊣ 995 Minimum Number of K Consecutive Bit Flips
⊣ 997 Find the Town Judge
⊣ 1002 Find Common Characters
⊣ 1004 Max Consecutive Ones III
⊣ 1011 Capacity To Ship Packages Within D Days
⊣ 1014 Best Sightseeing Pair
⊣ 1020 Number of Enclaves
⊣ 1028 Recover a Tree From Preorder Traversal
⊣ 1029 Two City Scheduling
⊣ 1035 Uncrossed Lines
⊣ 1041 Robot Bounded In Circle
⊣ 1043 Partition Array for Maximum Sum
⊣ 1046 Last Stone Weight
⊣ 1048 Longest String Chain
⊣ 1049 Last Stone Weight II
⊣ 1051 Height Checker
⊣ 1052 Grumpy Bookstore Owner
⊣ 1071 Greatest Common Divisor of Strings
⊣ 1072 Flip Columns For Maximum Number of Equal Rows
⊣ 1074 Number of Submatrices That Sum to Target
⊣ 1079 Letter Tile Possibilities
⊣ 1091 Shortest Path in Binary Matrix
⊣ 1092 Shortest Common Supersequence
⊣ 1094 Car Pooling
⊣ 1095 Find in Mountain Array
⊣ 1105 Filling Bookcase Shelves
⊣ 1106 Parsing A Boolean Expression
⊣ 1110 Delete Nodes And Return Forest
⊣ 1122 Relative Sort Array
⊣ 1129 Shortest Path with Alternating Colors
⊣ 1137 N-th Tribonacci Number
⊣ 1140 Stone Game II
⊣ 1143 Longest Common Subsequence
⊣ 1155 Number of Dice Rolls With Target Sum
⊣ 1160 Find Words That Can Be Formed by Characters
⊣ 1162 As Far from Land as Possible
⊣ 1189 Maximum Number of Balloons
⊣ 1190 Reverse Substrings Between Each Pair of Parentheses
⊣ 1208 Get Equal Substrings Within Budget
⊣ 1209 Remove All Adjacent Duplicates in String II
⊣ 1219 Path with Maximum Gold
⊣ 1220 Count Vowels Permutation
⊣ 1233 Remove Sub-Folders from the Filesystem
⊣ 1235 Maximum Profit in Job Scheduling
⊣ 1239 Maximum Length of a Concatenated String with Unique Characters
⊣ 1248 Count Number of Nice Subarrays
⊣ 1249 Minimum Remove to Make Valid Parentheses
⊣ 1254 Number of Closed Islands
⊣ 1255 Maximum Score Words Formed by Letters
⊣ 1260 Shift 2D Grid
⊣ 1267 Count Servers that Communicate
⊣ 1268 Search Suggestions System
⊣ 1269 Number of Ways to Stay in the Same Place After Some Steps
⊣ 1277 Count Square Submatrices with All Ones
⊣ 1288 Remove Covered Intervals
⊣ 1289 Minimum Falling Path Sum II
⊣ 1291 Sequential Digits
⊣ 1299 Replace Elements with Greatest Element on Right Side
⊣ 1310 XOR Queries of a Subarray
⊣ 1325 Delete Leaves With a Given Value
⊣ 1334 Find the City With the Smallest Number of Neighbors at a Threshold Distance
⊣ 1335 Minimum Difficulty of a Job Schedule
⊣ 1343 Number of Sub-arrays of Size K and Average Greater than or Equal to Threshold
⊣ 1358 Number of Substrings Containing All Three Characters
⊣ 1359 Count All Valid Pickup and Delivery Options
⊣ 1361 Validate Binary Tree Nodes
⊣ 1367 Linked List in Binary Tree
⊣ 1368 Minimum Cost to Make at Least One Valid Path in a Grid
⊣ 1371 Find the Longest Substring Containing Vowels in Even Counts
⊣ 1376 Time Needed to Inform All Employees
⊣ 1380 Lucky Numbers in a Matrix
⊣ 1383 Maximum Performance of a Team
⊣ 1394 Find Lucky Integer in an Array
⊣ 1395 Count Number of Teams
⊣ 1396 Design Underground System
⊣ 1400 Construct K Palindrome Strings
⊣ 1405 Longest Happy String
⊣ 1406 Stone Game III
⊣ 1408 String Matching in an Array
⊣ 1415 The k-th Lexicographical String of All Happy Strings of Length n
⊣ 1422 Maximum Score After Splitting a String
⊣ 1423 Maximum Points You Can Obtain from Cards
⊣ 1425 Constrained Subsequence Sum
⊣ 1436 Destination City
⊣ 1438 Longest Continuous Subarray With Absolute Diff Less Than or Equal to Limit
⊣ 1442 Count Triplets That Can Form Two Arrays of Equal XOR
⊣ 1443 Minimum Time to Collect All Apples in a Tree
⊣ 1448 Count Good Nodes in Binary Tree
⊣ 1456 Maximum Number of Vowels in a Substring of Given Length
⊣ 1457 Pseudo-Palindromic Paths in a Binary Tree
⊣ 1460 Make Two Arrays Equal by Reversing Subarrays
⊣ 1461 Check If a String Contains All Binary Codes of Size K
⊣ 1462 Course Schedule IV
⊣ 1463 Cherry Pickup II
⊣ 1466 Reorder Routes to Make All Paths Lead to the City Zero
⊣ 1470 Shuffle the Array
⊣ 1472 Design Browser History
⊣ 1475 Final Prices With a Special Discount in a Shop
⊣ 1481 Least Number of Unique Integers after K Removals
⊣ 1489 Find Critical and Pseudo-Critical Edges in Minimum Spanning Tree
⊣ 1496 Path Crossing
⊣ 1498 Number of Subsequences That Satisfy the Given Sum Condition
⊣ 1508 Range Sum of Sorted Subarray Sums
⊣ 1509 Minimum Difference Between Largest and Smallest Value in Three Moves
⊣ 1512 Number of Good Pairs
⊣ 1514 Path with Maximum Probability
⊣ 1518 Water Bottles
⊣ 1523 Count Odd Numbers in an Interval Range
⊣ 1524 Number of Sub-arrays With Odd Sum
⊣ 1526 Minimum Number of Increments on Subarrays to Form a Target Array
⊣ 1530 Number of Good Leaf Nodes Pairs (PRO)
⊣ 1531 String Compression II
⊣ 1544 Make The String Great
⊣ 1545 Find Kth Bit in Nth Binary String
⊣ 1547 Minimum Cost to Cut a Stick
⊣ 1553 Minimum Number of Days to Eat N Oranges
⊣ 1557 Minimum Number of Vertices to Reach All Nodes
⊣ 1568 Minimum Number of Days to Disconnect Island
⊣ 1572 Matrix Diagonal Sum
⊣ 1574 Shortest Subarray to be Removed to Make Array Sorted
⊣ 1578 Minimum Time to Make Rope Colorful
⊣ 1579 Remove Max Number of Edges to Keep Graph Fully Traversable
⊣ 1584 Min Cost to Connect All Points
⊣ 1590 Make Sum Divisible by P (PRO)
⊣ 1593 Split a String Into the Max Number of Unique Substrings
⊣ 1598 Crawler Log Folder
⊣ 1603 Design Parking System
⊣ 1605 Find Valid Matrix Given Row and Column Sums
⊣ 1608 Special Array With X Elements Greater Than or Equal X
⊣ 1609 Even Odd Tree
⊣ 1611 Minimum One Bit Operations to Make Integers Zero
⊣ 1614 Maximum Nesting Depth of the Parentheses
⊣ 1624 Largest Substring Between Two Equal Characters
⊣ 1626 Best Team With No Conflicts
⊣ 1631 Path With Minimum Effort
⊣ 1636 Sort Array by Increasing Frequency
⊣ 1637 Widest Vertical Area Between Two Points Containing No Points
⊣ 1639 Number of Ways to Form a Target String Given a Dictionary
⊣ 1642 Furthest Building You Can Reach
⊣ 1647 Minimum Deletions to Make Character Frequencies Unique
⊣ 1652 Defuse the Bomb
⊣ 1653 Minimum Deletions to Make String Balanced
⊣ 1658 Minimum Operations to Reduce X to Zero
⊣ 1662 Check If Two String Arrays are Equivalent
⊣ 1669 Merge In Between Linked Lists (PRO)
⊣ 1671 Minimum Number of Removals to Make Mountain Array
⊣ 1675 Minimize Deviation in Array (PRO)
⊣ 1684 Count the Number of Consistent Strings (PRO)
⊣ 1685 Sum of Absolute Differences in a Sorted Array
⊣ 1688 Count of Matches in Tournament
⊣ 1700 Number of Students Unable to Eat Lunch
⊣ 1701 Average Waiting Time
⊣ 1716 Calculate Money in Leetcode Bank
⊣ 1717 Maximum Score From Removing Substrings
⊣ 1718 Construct the Lexicographically Largest Valid Sequence
⊣ 1721 Swapping Nodes in a Linked List (PRO)
⊣ 1726 Tuple with Same Product
⊣ 1727 Largest Submatrix With Rearrangements
⊣ 1749 Maximum Absolute Sum of Any Subarray
⊣ 1750 Minimum Length of String After Deleting Similar Ends
⊣ 1752 Check if Array Is Sorted and Rotated
⊣ 1758 Minimum Changes To Make Alternating Binary String
⊣ 1760 Minimum Limit of Balls in a Bag
⊣ 1768 Merge Strings Alternately (PRO)
⊣ 1769 Minimum Number of Operations to Move All Balls to Each Box
⊣ 1780 Check if Number is a Sum of Powers of Three
⊣ 1790 Check if One String Swap Can Make Strings Equal
⊣ 1793 Maximum Score of a Good Subarray
⊣ 1799 Maximize Score After N Operations
⊣ 1800 Maximum Ascending Subarray Sum
⊣ 1813 Sentence Similarity III
⊣ 1822 Sign of the Product of an Array
⊣ 1823 Find the Winner of the Circular Game
⊣ 1829 Maximum XOR for Each Query
⊣ 1834 Single-Threaded CPU (PRO)
⊣ 1838 Frequency of the Most Frequent Element
⊣ 1845 Seat Reservation Manager
⊣ 1846 Maximum Element After Decreasing and Rearranging
⊣ 1849 Splitting a String Into Descending Consecutive Values
⊣ 1851 Minimum Interval to Include Each Query (PRO)
⊣ 1856 Maximum Subarray Min-Product
⊣ 1857 Largest Color Value in a Directed Graph
⊣ 1861 Rotating the Box
⊣ 1863 Sum of All Subset XOR Totals
⊣ 1866 Number of Ways to Rearrange Sticks With K Sticks Visible
⊣ 1871 Jump Game VII
⊣ 1882 Process Tasks Using Servers (PRO)
⊣ 1888 Minimum Number of Flips to Make the Binary String Alternating
⊣ 1897 Redistribute Characters to Make All Strings Equal
⊣ 1898 Maximum Number of Removable Characters
⊣ 1899 Merge Triplets to Form Target Triplet
⊣ 1903 Largest Odd Number in String (PRO)
⊣ 1905 Count Sub Islands
⊣ 1911 Maximum Alternating Subsequence Sum
⊣ 1913 Maximum Product Difference Between Two Pairs
⊣ 1921 Eliminate Maximum Number of Monsters
⊣ 1929 Concatenation of Array (PRO)
⊣ 1930 Unique Length-3 Palindromic Subsequences (PRO)
⊣ 1937 Maximum Number of Points with Cost
⊣ 1942 The Number of the Smallest Unoccupied Chair
⊣ 1944 Number of Visible People in a Queue (PRO)
⊣ 1958 Check if Move is Legal (PRO)
⊣ 1963 Minimum Number of Swaps to Make the String Balanced (PRO)
⊣ 1964 Find the Longest Valid Obstacle Course at Each Position
⊣ 1968 Array With Elements Not Equal to Average of Neighbors
⊣ 1975 Maximum Matrix Sum
⊣ 1976 Number of Ways to Arrive at Destination
⊣ 1980 Find Unique Binary String
⊣ 1984 Minimum Difference Between Highest and Lowest of K Scores
⊣ 1985 Find the Kth Largest Integer in the Array
⊣ 1993 Operations on Tree
⊣ 2001 Number of Pairs of Interchangeable Rectangles
⊣ 2002 Maximum Product of the Length of Two Palindromic Subsequences
⊣ 2009 Minimum Number of Operations to Make Array Continuous
⊣ 2013 Detect Squares
⊣ 2017 Grid Game
⊣ 2022 Convert 1D Array Into 2D Array
⊣ 2028 Find Missing Observations
⊣ 2033 Minimum Operations to Make a Uni-Value Grid
⊣ 2037 Minimum Number of Moves to Seat Everyone
⊣ 2038 Remove Colored Pieces if Both Neighbors are the Same Color
⊣ 2040 Kth Smallest Product of Two Sorted Arrays
⊣ 2044 Count Number of Maximum Bitwise-OR Subsets
⊣ 2045 Second Minimum Time to Reach Destination
⊣ 2050 Parallel Courses III
⊣ 2053 Kth Distinct String in an Array
⊣ 2058 Find the Minimum and Maximum Number of Nodes Between Critical Points
⊣ 2064 Minimized Maximum of Products Distributed to Any Store
⊣ 2070 Most Beautiful Item for Each Query
⊣ 2073 Time Needed to Buy Tickets
⊣ 2092 Find All People With Secret
⊣ 2096 Step-By-Step Directions From a Binary Tree Node to Another
⊣ 2101 Detonate the Maximum Bombs
⊣ 2108 Find First Palindromic String in the Array
⊣ 2109 Adding Spaces to a String
⊣ 2115 Find All Possible Recipes from Given Supplies
⊣ 2116 Check if a Parentheses String Can Be Valid
⊣ 2125 Number of Laser Beams in a Bank
⊣ 2127 Maximum Employees to Be Invited to a Meeting
⊣ 2130 Maximum Twin Sum of a Linked List
⊣ 2134 Minimum Swaps to Group All 1's Together II
⊣ 2140 Solving Questions With Brainpower
⊣ 2147 Number of Ways to Divide a Long Corridor
⊣ 2149 Rearrange Array Elements by Sign
⊣ 2161 Partition Array According to Given Pivot
⊣ 2181 Merge Nodes in Between Zeros
⊣ 2182 Construct String With Repeat Limit
⊣ 2185 Counting Words With a Given Prefix
⊣ 2191 Sort the Jumbled Numbers
⊣ 2196 Create Binary Tree From Descriptions
⊣ 2206 Divide Array Into Equal Pairs
⊣ 2215 Find the Difference of Two Arrays
⊣ 2218 Maximum Value of K Coins From Piles
⊣ 2220 Minimum Bit Flips to Convert Number
⊣ 2226 Maximum Candies Allocated to K Children
⊣ 2251 Number of Flowers in Full Bloom
⊣ 2257 Count Unguarded Cells in the Grid
⊣ 2264 Largest 3-Same-Digit Number in String
⊣ 2270 Number of Ways to Split Array
⊣ 2275 Largest Combination With Bitwise AND Greater Than Zero
⊣ 2285 Maximum Total Importance of Roads
⊣ 2290 Minimum Obstacle Removal to Reach Corner
⊣ 2300 Successful Pairs of Spells and Potions
⊣ 2306 Naming a Company
⊣ 2326 Spiral Matrix IV
⊣ 2331 Evaluate Boolean Binary Tree
⊣ 2348 Number of Zero-Filled Subarrays
⊣ 2353 Design a Food Rating System
⊣ 2359 Find Closest Node to Given Two Nodes
⊣ 2364 Count Number of Bad Pairs
⊣ 2369 Check if There is a Valid Partition For The Array
⊣ 2370 Longest Ideal Subsequence
⊣ 2373 Largest Local Values in a Matrix
⊣ 2375 Construct Smallest Number From DI String
⊣ 2379 Minimum Recolors to Get K Consecutive Black Blocks
⊣ 2381 Shifting Letters II
⊣ 2390 Removing Stars From a String
⊣ 2392 Build a Matrix With Conditions
⊣ 2401 Longest Nice Subarray
⊣ 2402 Meeting Rooms III
⊣ 2405 Optimal Partition of String
⊣ 2406 Divide Intervals Into Minimum Number of Groups
⊣ 2415 Reverse Odd Levels of Binary Tree
⊣ 2416 Sum of Prefix Scores of Strings
⊣ 2418 Sort the People
⊣ 2419 Longest Subarray With Maximum Bitwise AND
⊣ 2421 Number of Good Paths
⊣ 2425 Bitwise XOR of All Pairings
⊣ 2429 Minimize XOR
⊣ 2439 Minimize Maximum of Array
⊣ 2460 Apply Operations to an Array
⊣ 2461 Maximum Sum of Distinct Subarrays With Length K
⊣ 2466 Count Ways To Build Good Strings
⊣ 2467 Most Profitable Path in a Tree
⊣ 2471 Minimum Number of Operations to Sort a Binary Tree by Level
⊣ 2477 Minimum Fuel Cost to Report to the Capital
⊣ 2483 Minimum Penalty for a Shop
⊣ 2486 Append Characters to String to Make Subsequence
⊣ 2487 Remove Nodes From Linked List
⊣ 2490 Circular Sentence
⊣ 2491 Divide Players Into Teams of Equal Skill
⊣ 2492 Minimum Score of a Path Between Two Cities
⊣ 2493 Divide Nodes Into the Maximum Number of Groups
⊣ 2503 Maximum Number of Points From Grid Queries
⊣ 2516 Take K of Each Character From Left and Right
⊣ 2523 Closest Prime Numbers in Range
⊣ 2530 Maximal Score After Applying K Operations
⊣ 2542 Maximum Subsequence Score
⊣ 2551 Put Marbles in Bags
⊣ 2558 Take Gifts From the Richest Pile
⊣ 2559 Count Vowel Strings in Ranges
⊣ 2560 House Robber IV
⊣ 2563 Count the Number of Fair Pairs
⊣ 2570 Merge Two 2D Arrays by Summing Values
⊣ 2577 Minimum Time to Visit a Cell In a Grid
⊣ 2579 Count Total Number of Colored Cells
⊣ 2583 Kth Largest Sum in a Binary Tree
⊣ 2594 Minimum Time to Repair Cars
⊣ 2597 The Number of Beautiful Subsets
⊣ 2601 Prime Subtraction Operation
⊣ 2610 Convert an Array Into a 2D Array With Conditions
⊣ 2616 Minimize the Maximum Difference of Pairs
⊣ 2641 Cousins in Binary Tree II
⊣ 2658 Maximum Number of Fish in a Grid
⊣ 2678 Number of Senior Citizens
⊣ 2685 Count the Number of Complete Components
⊣ 2696 Minimum String Length After Removing Substrings
⊣ 2698 Find the Punishment Number of an Integer
⊣ 2706 Buy Two Chocolates
⊣ 2707 Extra Characters in a String
⊣ 2709 Greatest Common Divisor Traversal (PRO)
⊣ 2742 Painting the Walls
⊣ 2751 Robot Collisions
⊣ 2779 Maximum Beauty of an Array After Applying Operation
⊣ 2780 Minimum Index of a Valid Split
⊣ 2807 Insert Greatest Common Divisors in Linked List
⊣ 2812 Find the Safest Path in a Grid
⊣ 2818 Apply Operations to Maximize Score
⊣ 2864 Maximum Odd Binary Number
⊣ 2870 Minimum Number of Operations to Make Array Empty
⊣ 2872 Maximum Number of K-Divisible Components
⊣ 2914 Minimum Number of Changes to Make Binary String Beautiful
⊣ 2924 Find Champion II
⊣ 2929 Distribute Candies Among Children II
⊣ 2938 Separate Black and White Balls
⊣ 2940 Find Building Where Alice and Bob Can Meet
⊣ 2948 Make Lexicographically Smallest Array by Swapping Elements
⊣ 2958 Length of Longest Subarray With at Most K Frequency
⊣ 2962 Count Subarrays Where Max Element Appears at Least K Times
⊣ 2965 Find Missing and Repeated Values
⊣ 2966 Divide Array Into Arrays With Max Difference
⊣ 2971 Find Polygon With the Largest Perimeter
⊣ 2976 Minimum Cost to Convert String I
⊣ 3011 Find if Array Can Be Sorted
⊣ 3016 Minimum Number of Pushes to Type Word II
⊣ 3042 Count Prefix and Suffix Pairs I
⊣ 3043 Find the Length of the Longest Common Prefix
⊣ 3045 Count Prefix and Suffix Pairs II
⊣ 3068 Find the Maximum Sum of Node Values
⊣ 3097 Shortest Subarray With OR at Least K II
⊣ 3105 Longest Strictly Increasing or Strictly Decreasing Subarray
⊣ 3108 Minimum Cost Walk in Weighted Graph
⊣ 3110 Score of a String
⊣ 3133 Minimum Array End
⊣ 3151 Special Array I
⊣ 3169 Count Days Without Meetings
⊣ 3174 Clear Digits
⊣ 3191 Minimum Operations to Make Binary Array Elements Equal to One I
⊣ 3203 Find Minimum Diameter After Merging Two Trees
⊣ 3208 Alternating Groups II
⊣ 3217 Delete Nodes From Linked List Present in Array (PRO)
⊣ 3223 Minimum Length of String After Operations
⊣ 3243 Shortest Distance After Road Addition Queries I
⊣ 3254 Find the Power of K-Size Subarrays I
⊣ 3264 Final Array State After K Multiplication Operations I
⊣ 3306 Count of Substrings Containing Every Vowel and K Consonants II
⊣ 3394 Check if Grid can be Cut into Sections
⊣ 3434 Maximum Frequency After Subarray Operation
⊣ 3442 Maximum Difference Between Even and Odd Frequency I (PRO)
⊣ 3572 Maximize Y‑Sum by Picking a Triplet of Distinct X‑Values