卖他:
1249 Minimum Remove to Make Valid Parentheses680 Valid Palindrome II
314 Binary Tree Vertical Order Traversal
1762 Buildings With an Ocean View
1570 Dot Product of Two Sparse Vectors
938 Range Sum of BST
1650 Lowest Common Ancestor of a Binary Tree III
528 Random Pick with Weight
921 Minimum Add to Make Parentheses Valid
339 Nested List Weight Sum
236 Lowest Common Ancestor of a Binary Tree
408 Valid Word Abbreviation
973 K Closest Points to Origin
426 Convert Binary Search Tree to Sorted Doubly Linked List
71 Simplify Path
215 Kth Largest Element in an Array
227 Basic Calculator II
50 Pow(x, n)
987 Vertical Order Traversal of a Binary Tree
827 Making A Large Island
31 Next Permutation
199 Binary Tree Right Side View
560 Subarray Sum Equals K
65 Valid Number
791 Custom Sort String
670 Maximum Swap
543 Diameter of Binary Tree
636 Exclusive Time of Functions
347 Top K Frequent Elements
721 Accounts Merge
317 Shortest Distance from All Buildings
498 Diagonal Traverse
301 Remove Invalid Parentheses
162 Find Peak Element
415 Add Strings
138 Copy List with Random Pointer
1091 Shortest Path in Binary Matrix
249 Group Shifted Strings
56 Merge Intervals
523 Continuous Subarray Sum
282 Expression Add Operators
173 Binary Search Tree Iterator
1891 Cutting Ribbons
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狗狗
366 Find Leaves of Binary Tree
1293 Shortest Path in a Grid with Obstacles Elimination
1937 Maximum Number of Points with Cost
1146 Snapshot Array
2007 Find Original Array From Doubled Array
2096 Step-By-Step Directions From a Binary Tree Node to Another
68 Text Justification
833 Find And Replace in String
2128 Remove All Ones With Row and Column Flips
843 Guess the Word
2034 Stock Price Fluctuation
792 Number of Matching Subsequences
150 Evaluate Reverse Polish Notation
552 Student Attendance Record II
2013 Detect Squares
1048 Longest String Chain
1610 Maximum Number of Visible Points
359 Logger Rate Limiter
1284 Minimum Number of Flips to Convert Binary Matrix to Zero Matrix
2115 Find All Possible Recipes from Given Supplies
418 Sentence Screen Fitting
954 Array of Doubled Pairs
539 Minimum Time Difference
329 Longest Increasing Path in a Matrix
1834 Single-Threaded CPU
1218 Longest Arithmetic Subsequence of Given Difference
652 Find Duplicate Subtrees
777 Swap Adjacent in LR String
1277 Count Square Submatrices with All Ones
690 Employee Importance
384 Shuffle an Array
818 Race Car
1423 Maximum Points You Can Obtain from Cards
1240 Tiling a Rectangle with the Fewest Squares
1691 Maximum Height by Stacking Cuboids
631 Design Excel Sum Formula
664 Strange Printer
727 Minimum Window Subsequence
990 Satisfiability of Equality Equations
803 Bricks Falling When Hit
528 Random Pick with Weight
726 Number of Atoms
394 Decode String
1987 Number of Unique Good Subsequences
302 Smallest Rectangle Enclosing Black Pixels
772 Basic Calculator III
593 Valid Square
1345 Jump Game IV
1397 Find All Good Strings
2018 Check if Word Can Be Placed In Crossword
794 Valid Tic-Tac-Toe State
900 RLE Iterator
158 Read N Characters Given read4 II - Call Multiple Times
1096 Brace Expansion II
981 Time Based Key-Value Store
299 Bulls and Cows
1554 Strings Differ by One Character
1632 Rank Transform of a Matrix
489 Robot Room Cleaner
562 Longest Line of Consecutive One in Matrix
410 Split Array Largest Sum
388 Longest Absolute File Path
1877 Minimize Maximum Pair Sum in Array
679 24 Game
939 Minimum Area Rectangle
745 Prefix and Suffix Search
2092 Find All People With Secret
1728 Cat and Mouse II
1882 Process Tasks Using Servers
660 Remove 9
1272 Remove Interval
853 Car Fleet
715 Range Module
447 Number of Boomerangs
1296 Divide Array in Sets of K Consecutive Numbers
1153 String Transforms Into Another String
1032 Stream of Characters
1592 Rearrange Spaces Between Words
642 Design Search Autocomplete System
564 Find the Closest Palindrome
1776 Car Fleet II
837 New 21 Game
200 Number of Islands
284 Peeking Iterator
465 Optimal Account Balancing
407 Trapping Rain Water II
269 Alien Dictionary
1948 Delete Duplicate Folders in System
1477 Find Two Non-overlapping Sub-arrays Each With Target Sum
1254 Number of Closed Islands
1855 Maximum Distance Between a Pair of Values
305 Number of Islands II
732 My Calendar III
2135 Count Words Obtained After Adding a Letter
975 Odd Even Jump
835 Image Overlap
1509 Minimum Difference Between Largest and Smallest Value in Three Moves
307 Range Sum Query - Mutable
253 Meeting Rooms II
1244 Design A Leaderboard
846 Hand of Straights
1499 Max Value of Equation
1138 Alphabet Board Path
1376 Time Needed to Inform All Employees
1275 Find Winner on a Tic Tac Toe Game
920 Number of Music Playlists
233 Number of Digit One
1 Two Sum
2030 Smallest K-Length Subsequence With Occurrences of a Letter
778 Swim in Rising Water
588 Design In-Memory File System
1226 The Dining Philosophers
354 Russian Doll Envelopes
1438 Longest Continuous Subarray With Absolute Diff Less Than or Equal to Limit
1007 Minimum Domino Rotations For Equal Row
788 Rotated Digits
886 Possible Bipartition
62 Unique Paths
1263 Minimum Moves to Move a Box to Their Target Location
1102 Path With Maximum Minimum Value
85 Maximal Rectangle
2103 Rings and Rods
1642 Furthest Building You Can Reach
659 Split Array into Consecutive Subsequences
1110 Delete Nodes And Return Forest
1230 Toss Strange Coins
1231 Divide Chocolate
871 Minimum Number of Refueling Stops
676 Implement Magic Dictionary
1088 Confusing Number II
568 Maximum Vacation Days
417 Pacific Atlantic Water Flow
149 Max Points on a Line
2083 Substrings That Begin and End With the Same Letter
300 Longest Increasing Subsequence
1377 Frog Position After T Seconds
1368 Minimum Cost to Make at Least One Valid Path in a Grid
1864 Minimum Number of Swaps to Make the Binary String Alternating
56 Merge Intervals
692 Top K Frequent Words
1494 Parallel Courses II
505 The Maze II
1091 Shortest Path in Binary Matrix
353 Design Snake Game
336 Palindrome Pairs
815 Bus Routes
708 Insert into a Sorted Circular Linked List
850 Rectangle Area II
1166 Design File System
10 Regular Expression Matching
729 My Calendar I
524 Longest Word in Dictionary through Deleting
428 Serialize and Deserialize N-ary Tree
---------
巨硬
1405 Longest Happy String
151 Reverse Words in a String
146 LRU Cache
1647 Minimum Deletions to Make Character Frequencies Unique
1304 Find N Unique Integers Sum up to Zero
979 Distribute Coins in Binary Tree
200 Number of Islands
1386 Cinema Seat Allocation
545 Boundary of Binary Tree
1822 Sign of the Product of an Array
1448 Count Good Nodes in Binary Tree
285 Inorder Successor in BST
1344 Angle Between Hands of a Clock
233 Number of Digit One
1531 String Compression II
352 Data Stream as Disjoint Intervals
460 LFU Cache
462 Minimum Moves to Equal Array Elements II
297 Serialize and Deserialize Binary Tree
984 String Without AAA or BBB
588 Design In-Memory File System
568 Maximum Vacation Days
394 Decode String
54 Spiral Matrix
273 Integer to English Words
1639 Number of Ways to Form a Target String Given a Dictionary
253 Meeting Rooms II
895 Maximum Frequency Stack
33 Search in Rotated Sorted Array
56 Merge Intervals
510 Inorder Successor in BST II
116 Populating Next Right Pointers in Each Node
49 Group Anagrams
517 Super Washing Machines
380 Insert Delete GetRandom O(1)
79 Word Search
716 Max Stack
1275 Find Winner on a Tic Tac Toe Game
2061 Number of Spaces Cleaning Robot Cleaned
295 Find Median from Data Stream
210 Course Schedule II
1392 Longest Happy Prefix
17 Letter Combinations of a Phone Number
340 Longest Substring with At Most K Distinct Characters
362 Design Hit Counter
93 Restore IP Addresses
651 4 Keys Keyboard
535 Encode and Decode TinyURL
706 Design HashMap
212 Word Search II
1593 Split a String Into the Max Number of Unique Substrings
348 Design Tic-Tac-Toe
44 Wildcard Matching
41 First Missing Positive
3 Longest Substring Without Repeating Characters
322 Coin Change
968 Binary Tree Cameras
1615 Maximal Network Rank
1546 Maximum Number of Non-Overlapping Subarrays With Sum Equals Target
4 Median of Two Sorted Arrays
238 Product of Array Except Self
103 Binary Tree Zigzag Level Order Traversal
1676 Lowest Common Ancestor of a Binary Tree IV
319 Bulb Switcher
994 Rotting Oranges
312 Burst Balloons
995 Minimum Number of K Consecutive Bit Flips
207 Course Schedule
1166 Design File System
1032 Stream of Characters
428 Serialize and Deserialize N-ary Tree
2 Add Two Numbers
1578 Minimum Time to Make Rope Colorful
540 Single Element in a Sorted Array
227 Basic Calculator II
224 Basic Calculator
419 Battleships in a Board
1 Two Sum
171 Excel Sheet Column Number
818 Race Car
173 Binary Search Tree Iterator
5 Longest Palindromic Substring
1222 Queens That Can Attack the King
43 Multiply Strings
395 Longest Substring with At Least K Repeating Characters
622 Design Circular Queue
138 Copy List with Random Pointer
636 Exclusive Time of Functions
186 Reverse Words in a String II
268 Missing Number
20 Valid Parentheses
692 Top K Frequent Words
347 Top K Frequent Elements
8 String to Integer (atoi)
215 Kth Largest Element in an Array
1375 Number of Times Binary String Is Prefix-Aligned
157 Read N Characters Given Read4
694 Number of Distinct Islands
236 Lowest Common Ancestor of a Binary Tree
1836 Remove Duplicates From an Unsorted Linked List
1267 Count Servers that Communicate
51 N-Queens
794 Valid Tic-Tac-Toe State
722 Remove Comments
317 Shortest Distance from All Buildings
125 Valid Palindrome
1123 Lowest Common Ancestor of Deepest Leaves
437 Path Sum III
1487 Making File Names Unique
239 Sliding Window Maximum
443 String Compression
22 Generate Parentheses
240 Search a 2D Matrix II
1168 Optimize Water Distribution in a Village
75 Sort Colors
1044 Longest Duplicate Substring
1091 Shortest Path in Binary Matrix
128 Longest Consecutive Sequence
25 Reverse Nodes in k-Group
415 Add Strings
42 Trapping Rain Water
489 Robot Room Cleaner
759 Employee Free Time
836 Rectangle Overlap
1161 Maximum Level Sum of a Binary Tree
1551 Minimum Operations to Make Array Equal
1008 Construct Binary Search Tree from Preorder Traversal
470 Implement Rand10() Using Rand7()
1367 Linked List in Binary Tree
632 Smallest Range Covering Elements from K Lists
922 Sort Array By Parity II
450 Delete Node in a BST
1155 Number of Dice Rolls With Target Sum
768 Max Chunks To Make Sorted II
1644 Lowest Common Ancestor of a Binary Tree II
283 Move Zeroes
1763 Longest Nice Substring
105 Construct Binary Tree from Preorder and Inorder Traversal
12 Integer to Roman
287 Find the Duplicate Number
232 Implement Queue using Stacks
1650 Lowest Common Ancestor of a Binary Tree III
15 3Sum
735 Asteroid Collision
581 Shortest Unsorted Continuous Subarray
72 Edit Distance
168 Excel Sheet Column Title
1884 Egg Drop With 2 Eggs and N Floors
165 Compare Version Numbers
23 Merge k Sorted Lists
269 Alien Dictionary
993 Cousins in Binary Tree
1249 Minimum Remove to Make Valid Parentheses
680 Valid Palindrome II
314 Binary Tree Vertical Order Traversal
1762 Buildings With an Ocean View
1570 Dot Product of Two Sparse Vectors
938 Range Sum of BST
1650 Lowest Common Ancestor of a Binary Tree III
528 Random Pick with Weight
921 Minimum Add to Make Parentheses Valid
408 Valid Word Abbreviation
236 Lowest Common Ancestor of a Binary Tree
339 Nested List Weight Sum
426 Convert Binary Search Tree to Sorted Doubly Linked List
973 K Closest Points to Origin
71 Simplify Path
215 Kth Largest Element in an Array
227 Basic Calculator II
50 Pow(x, n)
987 Vertical Order Traversal of a Binary Tree
199 Binary Tree Right Side View
31 Next Permutation
65 Valid Number
827 Making A Large Island
791 Custom Sort String
543 Diameter of Binary Tree
636 Exclusive Time of Functions
347 Top K Frequent Elements
249 Group Shifted Strings
721 Accounts Merge
670 Maximum Swap
560 Subarray Sum Equals K
498 Diagonal Traverse
317 Shortest Distance from All Buildings
162 Find Peak Element
301 Remove Invalid Parentheses
1091 Shortest Path in Binary Matrix
56 Merge Intervals
138 Copy List with Random Pointer
523 Continuous Subarray Sum
415 Add Strings
282 Expression Add Operators
125 Valid Palindrome
1011 Capacity To Ship Packages Within D Days
1047 Remove All Adjacent Duplicates In String
766 Toeplitz Matrix
173 Binary Search Tree Iterator
88 Merge Sorted Array
1891 Cutting Ribbons
146 LRU Cache
953 Verifying an Alien Dictionary
133 Clone Graph
708 Insert into a Sorted Circular Linked List
140 Word Break II
23 Merge k Sorted Lists
266 Palindrome Permutation
42 Trapping Rain Water
346 Moving Average from Data Stream
1539 Kth Missing Positive Number
1216 Valid Palindrome III
1382 Balance a Binary Search Tree
286 Walls and Gates
2060 Check if an Original String Exists Given Two Encoded Strings
986 Interval List Intersections
1868 Product of Two Run-Length Encoded Arrays
129 Sum Root to Leaf Numbers
616 Add Bold Tag in String
273 Integer to English Words
2056 Number of Valid Move Combinations On Chessboard
348 Design Tic-Tac-Toe
269 Alien Dictionary
398 Random Pick Index
536 Construct Binary Tree from String
253 Meeting Rooms II
778 Swim in Rising Water
270 Closest Binary Search Tree Value
1344 Angle Between Hands of a Clock
863 All Nodes Distance K in Binary Tree
1004 Max Consecutive Ones III
1428 Leftmost Column with at Least a One
515 Find Largest Value in Each Tree Row
139 Word Break
939 Minimum Area Rectangle
8 String to Integer (atoi)
556 Next Greater Element III
658 Find K Closest Elements
825 Friends Of Appropriate Ages
246 Strobogrammatic Number
647 Palindromic Substrings
43 Multiply Strings
605 Can Place Flowers
896 Monotonic Array
76 Minimum Window Substring
865 Smallest Subtree with all the Deepest Nodes
958 Check Completeness of a Binary Tree
34 Find First and Last Position of Element in Sorted Array
1944 Number of Visible People in a Queue
325 Maximum Size Subarray Sum Equals k
2076 Process Restricted Friend Requests
16 3Sum Closest
739 Daily Temperatures
380 Insert Delete GetRandom O(1)
1060 Missing Element in Sorted Array
124 Binary Tree Maximum Path Sum
1110 Delete Nodes And Return Forest
1644 Lowest Common Ancestor of a Binary Tree II
10 Regular Expression Matching
1522 Diameter of N-Ary Tree
296 Best Meeting Point
463 Island Perimeter
689 Maximum Sum of 3 Non-Overlapping Subarrays
1209 Remove All Adjacent Duplicates in String II
114 Flatten Binary Tree to Linked List
1123 Lowest Common Ancestor of Deepest Leaves
116 Populating Next Right Pointers in Each Node
1424 Diagonal Traverse II
489 Robot Room Cleaner
224 Basic Calculator
963 Minimum Area Rectangle II
2071 Maximum Number of Tasks You Can Assign
983 Minimum Cost For Tickets
329 Longest Increasing Path in a Matrix
234 Palindrome Linked List
977 Squares of a Sorted Array
724 Find Pivot Index
695 Max Area of Island
767 Reorganize String
298 Binary Tree Longest Consecutive Sequence
2019 The Score of Students Solving Math Expression
2065 Maximum Path Quality of a Graph
2081 Sum of k-Mirror Numbers
311 Sparse Matrix Multiplication
33 Search in Rotated Sorted Array
200 Number of Islands
238 Product of Array Except Self
304 Range Sum Query 2D - Immutable
406 Queue Reconstruction by Height
163 Missing Ranges
824 Goat Latin
1026 Maximum Difference Between Node and Ancestor
856 Score of Parentheses
1244 Design A Leaderboard
19 Remove Nth Node From End of List
503 Next Greater Element II
2025 Maximum Number of Ways to Partition an Array
1245 Tree Diameter
166 Fraction to Recurring Decimal
742 Closest Leaf in a Binary Tree
1541 Minimum Insertions to Balance a Parentheses String
399 Evaluate Division
637 Average of Levels in Binary Tree
935 Knight Dialer
247 Strobogrammatic Number II
103 Binary Tree Zigzag Level Order Traversal
333 Largest BST Subtree
1614 Maximum Nesting Depth of the Parentheses
341 Flatten Nested List Iterator
934 Shortest Bridge
1973 Count Nodes Equal to Sum of Descendants
1053 Previous Permutation With One Swap
378 Kth Smallest Element in a Sorted Matrix
494 Target Sum
109 Convert Sorted List to Binary Search Tree
1305 All Elements in Two Binary Search Trees
211 Design Add and Search Words Data Structure
1197 Minimum Knight Moves
416 Partition Equal Subset Sum
1102 Path With Maximum Minimum Value
1161 Maximum Level Sum of a Binary Tree
15 3Sum
67 Add Binary
29 Divide Two Integers
79 Word Search
496 Next Greater Element I
1038 Binary Search Tree to Greater Sum Tree
319 Bulb Switcher
381 Insert Delete GetRandom O(1) - Duplicates allowed
480 Sliding Window Median
621 Task Scheduler
735 Asteroid Collision
78 Subsets
285 Inorder Successor in BST
1985 Find the Kth Largest Integer in the Array
207 Course Schedule
387 First Unique Character in a String
271 Encode and Decode Strings
622 Design Circular Queue
1293 Shortest Path in a Grid with Obstacles Elimination
932 Beautiful Array
723 Candy Crush
540 Single Element in a Sorted Array
1498 Number of Subsequences That Satisfy the Given Sum Condition
22 Generate Parentheses
1265 Print Immutable Linked List in Reverse
692 Top K Frequent Words
661 Image Smoother
219 Contains Duplicate II
14 Longest Common Prefix
1202 Smallest String With Swaps
719 Find K-th Smallest Pair Distance
419 Battleships in a Board
1926 Nearest Exit from Entrance in Maze
20 Valid Parentheses
2092 Find All People With Secret
572 Subtree of Another Tree
283 Move Zeroes
62 Unique Paths
2 Add Two Numbers
788 Rotated Digits
1104 Path In Zigzag Labelled Binary Tree
316 Remove Duplicate Letters
332 Reconstruct Itinerary
74 Search a 2D Matrix
862 Shortest Subarray with Sum at Least K
2033 Minimum Operations to Make a Uni-Value Grid
54 Spiral Matrix
126 Word Ladder II
239 Sliding Window Maximum
328 Odd Even Linked List
1485 Clone Binary Tree With Random Pointer
73 Set Matrix Zeroes
1319 Number of Operations to Make Network Connected
772 Basic Calculator III
581 Shortest Unsorted Continuous Subarray
336 Palindrome Pairs
49 Group Anagrams
3 Longest Substring Without Repeating Characters
694 Number of Distinct Islands
1554 Strings Differ by One Character
1034 Coloring A Border
1275 Find Winner on a Tic Tac Toe Game
121 Best Time to Buy and Sell Stock
674 Longest Continuous Increasing Subsequence
1559 Detect Cycles in 2D Grid
919 Complete Binary Tree Inserter
443 String Compression
1834 Single-Threaded CPU
974 Subarray Sums Divisible by K
1044 Longest Duplicate Substring
678 Valid Parenthesis String
101 Symmetric Tree
1099 Two Sum Less Than K
875 Koko Eating Bananas
1168 Optimize Water Distribution in a Village
437 Path Sum III
161 One Edit Distance
153 Find Minimum in Rotated Sorted Array
66 Plus One
435 Non-overlapping Intervals
643 Maximum Average Subarray I
1460 Make Two Arrays Equal by Reversing Sub-arrays
148 Sort List
17 Letter Combinations of a Phone Number
39 Combination Sum
1218 Longest Arithmetic Subsequence of Given Difference
545 Boundary of Binary Tree
63 Unique Paths II
1008 Construct Binary Search Tree from Preorder Traversal
51 N-Queens
410 Split Array Largest Sum
41 First Missing Positive
48 Rotate Image
477 Total Hamming Distance
295 Find Median from Data Stream
1136 Parallel Courses
57 Insert Interval
1213 Intersection of Three Sorted Arrays
117 Populating Next Right Pointers in Each Node II
303 Range Sum Query - Immutable
274 H-Index
46 Permutations
989 Add to Array-Form of Integer
752 Open the Lock
1748 Sum of Unique Elements
127 Word Ladder
787 Cheapest Flights Within K Stops
32 Longest Valid Parentheses
703 Kth Largest Element in a Stream
278 First Bad Version
92 Reverse Linked List II
113 Path Sum II
209 Minimum Size Subarray Sum
1963 Minimum Number of Swaps to Make the String Balanced
597 Friend Requests I: Overall Acceptance Rate
4 Median of Two Sorted Arrays
702 Search in a Sorted Array of Unknown Size
809 Expressive Words
844 Backspace String Compare
763 Partition Labels
716 Max Stack
1351 Count Negative Numbers in a Sorted Matrix
648 Replace Words
230 Kth Smallest Element in a BST
310 Minimum Height Trees
1901 Find a Peak Element II
268 Missing Number
44 Wildcard Matching
1094 Car Pooling
394 Decode String
21 Merge Two Sorted Lists
698 Partition to K Equal Sum Subsets
1331 Rank Transform of an Array
529 Minesweeper
454 4Sum II
1 Two Sum
1029 Two City Scheduling
102 Binary Tree Level Order Traversal
814 Binary Tree Pruning
26 Remove Duplicates from Sorted Array
1048 Longest String Chain
538 Convert BST to Greater Tree
55 Jump Game
25 Reverse Nodes in k-Group
1192 Critical Connections in a Network
525 Contiguous Array
951 Flip Equivalent Binary Trees
108 Convert Sorted Array to Binary Search Tree
448 Find All Numbers Disappeared in an Array
68 Text Justification
340 Longest Substring with At Most K Distinct Characters
112 Path Sum
1909 Remove One Element to Make the Array Strictly Increasing
759 Employee Free Time
90 Subsets II
210 Course Schedule II
300 Longest Increasing Subsequence
259 3Sum Smaller
242 Valid Anagram
128 Longest Consecutive Sequence
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