KK's blog

11-13

LeetCode 589 N-ary Tree Preorder Traversal

11-13

LeetCode 94 Binary Tree Inorder Traversal

11-13

LeetCode 144 Binary Tree Preorder Traversal

11-06

LeetCode 1706 Where Will the Ball Fall

11-06

LeetCode 1337 The K Weakest Rows in a Matrix

10-02

LeetCode 2089 Find Target Indices After Sorting Array

03-19

LeetCode 791 Custom Sort String

03-19

LeetCode 426 Convert Binary Search Tree to Sorted Doubly Linked List

03-19

LeetCode 408 Valid Word Abbreviation

03-16

LeetCode 921 Minimum Add to Make Parentheses Valid

03-16

LeetCode 938 Range Sum of BST

03-15

LeetCode 706 Design HashMap

03-07

Mock 002 Print 5-min intervals

03-01

LeetCode 772 Basic Calculator III

02-24

LeetCode 432 All O one Data Structure

02-16

LeetCode 2034 Stock Price Fluctuation

02-16

LeetCode 2128 Remove All Ones With Row and Column Flips

02-16

LeetCode 843 Guess the Word

02-16

LeetCode 833 Find And Replace in String

02-16

LeetCode 2007 Find Original Array From Doubled Array

02-16

LeetCode 1146 Snapshot Array

02-16

LeetCode 1937 Maximum Number of Points with Cost

02-16

LeetCode 1293 Shortest Path in a Grid with Obstacles Elimination

02-15

LeetCode 670 Maximum Swap

02-15

LeetCode 567 Permutation in String

02-15

LeetCode 438 Find All Anagrams in a String

02-15

Mock 001 Count changes for two N-trees

02-15

LeetCode 1166 Design File System

02-15

LeetCode 839 Similar String Groups

02-15

LeetCode 1347 Minimum Number of Steps to Make Two Strings Anagram

02-15

LeetCode 854 K-Similar Strings

02-15

LeetCode Buddy Strings

02-13

LeetCode 351 Android Unlock Patterns

02-13

LeetCode 158 Read N Characters Given read4 II - Call Multiple Times

02-13

LeetCode 157 Read N Characters Given Read4

02-12

Karat 004 Ads Conversion

02-12

LeetCode 498 Diagonal Traverse

02-08

LeetCode 1779 Find Nearest Point That Has the Same X or Y Coordinate

02-08

LeetCode 1761 Minimum Degree of a Connected Trio in a Graph

02-08

LeetCode 979 Distribute Coins in Binary Tree

02-07

LeetCode 1448 Count Good Nodes in Binary Tree

02-07

LeetCode 1304 Find N Unique Integers Sum up to Zero

02-07

LeetCode 984 String Without AAA or BBB

02-07

LeetCode 1405 Longest Happy String

02-07

LeetCode 1647 Minimum Deletions to Make Character Frequencies Unique

02-07

Karat 003 Nonogram

02-07

LeetCode 1522 Diameter of N-Ary Tree

02-07

LeetCode 543 Diameter of Binary Tree

02-06

LeetCode 549 Binary Tree Longest Consecutive Sequence II

02-06

LeetCode 298 Binary Tree Longest Consecutive Sequence

02-06

LeetCode 785 Is Graph Bipartite?

02-06

LeetCode 770 Basic Calculator IV

01-30

Karat 002 Longest Common Continuous Subarray

01-30

LeetCode 518 Coin Change 2

01-29

LeetCode 259 3Sum Smaller

01-29

LeetCode 628 Maximum Product of Three Numbers

01-29

LeetCode 1143 Longest Common Subsequence

01-27

LeetCode 399 Evaluate Division

01-27

LeetCode 384 Shuffle an Array

01-27

LeetCode 370 Range Addition

01-26

LeetCode 366 Find Leaves of Binary Tree

01-26

LeetCode 364 Nested List Weight Sum II

01-25

LeetCode 359 Logger Rate Limiter

01-24

LeetCode 337 House Robber III

01-24

LeetCode 340 Longest Substring with At Most K Distinct Characters

01-24

LeetCode 346 Moving Average from Data Stream

01-23

LeetCode 328 Odd Even Linked List

01-23

LeetCode 325 Maximum Size Subarray Sum Equals k

01-23

LeetCode 315 Count of Smaller Numbers After Self

01-23

LeetCode 348 Design Tic-Tac-Toe

01-23

LeetCode 317 Shortest Distance from All Buildings

01-21

LeetCode 304 Range Sum Query 2D - Immutable

01-20

LeetCode 721 Accounts Merge

01-20

LeetCode 287 Find the Duplicate Number

01-20

LeetCode 286 Walls and Gates

01-20

LeetCode 283 Move Zeroes

01-19

LeetCode 282 Expression Add Operators

01-19

LeetCode 277 Find the Celebrity

01-19

LeetCode 270 Closest Binary Search Tree Value

01-19

LeetCode 268 Missing Number

01-19

LeetCode 266 Palindrome Permutation

01-19

LeetCode 256 Paint House

01-18

LeetCode 249 Group Shifted Strings

01-18

LeetCode 243 Shortest Word Distance

01-18

LeetCode 242 Valid Anagram

01-18

LeetCode 241 Different Ways to Add Parentheses

01-18

LeetCode 095 Unique Binary Search Trees II

01-18

LeetCode 240 Search a 2D Matrix II

01-18

LeetCode 235 Lowest Common Ancestor of a Binary Search Tree

01-18

LeetCode 234 Palindrome Linked List

01-18

LeetCode 296 Best Meeting Point

01-18

LeetCode 218 The Skyline Problem

01-18

LeetCode 221 Maximal Square

01-17

LeetCode 211 Design Add and Search Words Data Structure

01-17

LeetCode 207 Course Schedule

01-17

LeetCode 206 Reverse Linked List

01-17

LeetCode 204 Count Primes

01-17

LeetCode 191 Number of 1 Bits

01-17

LeetCode 199 Binary Tree Right Side View

01-17

LeetCode 189 Rotate Array

01-17

LeetCode 169 Majority Element

01-17

LeetCode 163 Missing Ranges

01-17

LeetCode 160 Intersection of Two Linked Lists

01-17

LeetCode 152 Maximum Product Subarray

01-17

LeetCode 151 Reverse Words in a String

01-17

LeetCode 150 Evaluate Reverse Polish Notation

01-17

LeetCode 149 Max Points on a Line

01-16

LeetCode 142 Linked List Cycle II

01-16

LeetCode 141 Linked List Cycle

01-16

LeetCode 136 Single Number

01-16

LeetCode 129 Sum Root to Leaf Numbers

01-16

LeetCode 125 Valid Palindrome

01-16

LeetCode 118 Pascal's Triangle

01-16

LeetCode 100 Same Tree

01-16

LeetCode 093 Restore IP Addresses

01-16

LeetCode 091 Decode Ways

01-15

LeetCode 092 Reverse Linked List II

01-15

LeetCode 090 Subsets II

01-15

LeetCode 2139 Minimum Moves to Reach Target Score

01-15

LeetCode 2140 Solving Questions With Brainpower

01-15

LeetCode 085 Maximal Rectangle

01-15

LeetCode 084 Largest Rectangle in Histogram

01-15

LeetCode 072 Edit Distance

01-15

LeetCode 076 Minimum Window Substring

01-15

LeetCode 073 Set Matrix Zeroes

01-14

LeetCode 078 Subsets

01-13

LeetCode 065 Valid Number

01-05

LeetCode 063 Unique Paths II

01-05

LeetCode 062 Unique Paths

01-05

LeetCode 064 Minimum Path Sum

01-04

LeetCode 427 Construct Quad Tree

01-04

LeetCode 387 First Unique Character in a String

01-04

LeetCode 339 Nested List Weight Sum

01-04

LeetCode 074 Search a 2D Matrix

01-04

LeetCode 008 String to Integer (atoi)

01-04

LeetCode 016 3Sum Closest

01-03

LeetCode 088 Merge Sorted Array

01-03

LeetCode 034 Find First and Last Position of Element in Sorted Array

01-03

LeetCode 787 Cheapest Flights Within K Stops

01-03

LeetCode 166 Fraction to Recurring Decimal

01-03

LeetCode 281 Zigzag Iterator

01-03

LeetCode 284 Peeking Iterator

01-03

Iterator

01-03

LeetCode 341 Flatten Nested List Iterator

01-03

LeetCode 251 Flatten 2D Vector

01-03

LeetCode 036 Valid Sudoku

01-03

LeetCode 043 Multiply Strings

01-02

LeetCode 048 Rotate Image

01-01

LeetCode 395 Longest Substring with At Least K Repeating Characters

12-30

LeetCode 101 Symmetric Tree

12-30

LeetCode 102 Binary Tree Level Order Traversal

12-30

LeetCode 103 Binary Tree Zigzag Level Order Traversal

12-29

LeetCode 114 Flatten Binary Tree to Linked List

12-29

LeetCode 070 Climbing Stairs

12-29

LeetCode 254 Factor Combinations

12-29

LeetCode 377 Combination Sum IV

12-29

LeetCode 216 Combination Sum III

12-29

LeetCode 077 Combinations

12-29

LeetCode 040 Combination Sum II

12-29

LeetCode 039 Combination Sum

12-28

LeetCode 1650 Lowest Common Ancestor of a Binary Tree III

12-28

LeetCode 238 Product of Array Except Self

12-28

LeetCode 037 Sudoku Solver

12-28

LeetCode 871 Minimum Number of Refueling Stops

12-27

LeetCode 909 Snakes and Ladders

12-27

LeetCode 987 Vertical Order Traversal of a Binary Tree

12-26

LeetCode 453 Minimum Moves to Equal Array Elements

12-26

LeetCode 926 Flip String to Monotone Increasing

12-26

LeetCode 828 Count Unique Characters of All Substrings of a Given String

12-26

LeetCode 071 Simplify Path

12-26

LeetCode 526 Beautiful Arrangement

12-26

LeetCode 759 Employee Free Time

12-26

LeetCode 1010 Pairs of Songs With Total Durations Divisible by 60

12-26

LeetCode 018 4Sum

12-25

LeetCode 244 Shortest Word Distance II

12-25

LeetCode 2121 Intervals Between Identical Elements

12-25

LeetCode 529 Minesweeper

12-25

LeetCode 981 Time Based Key-Value Store

12-25

LeetCode 937 Reorder Data in Log Files

12-25

LeetCode 1268 Search Suggestions System

12-24

LeetCode 735 Asteroid Collision

12-24

LeetCode 314 Binary Tree Vertical Order Traversal

12-24

LeetCode 1209 Remove All Adjacent Duplicates in String II

12-24

LeetCode 289 Game of Life

12-24

LeetCode 362 Design Hit Counter

12-24

LeetCode 692 Top K Frequent Words

12-23

LeetCode 718 Maximum Length of Repeated Subarray

12-23

LeetCode 162 Find Peak Element

12-23

LeetCode 012 Integer to Roman

12-23

LeetCode 1710 Maximum Units on a Truck

12-22

LeetCode 009 Palindrome Number

12-22

LeetCode 021 Merge Two Sorted Lists

12-22

LeetCode 174 Dungeon Game

12-21

LeetCode 013 Roman to Integer

12-21

LeetCode 1570 Dot Product of Two Sparse Vectors

12-21

LeetCode 050 Pow(x, n)

12-20

LeetCode 443 String Compression

12-20

LeetCode 011 Container With Most Water

12-20

LeetCode 1762 Buildings With an Ocean View

12-19

LeetCode 068 Text Justification

12-19

LeetCode 005 Longest Palindromic Substring

12-19

LeetCode 815 Bus Routes

12-18

LeetCode 809 Expressive Words

12-16

LeetCode 829 Consecutive Numbers Sum

12-16

LeetCode 041 First Missing Positive

12-16

LeetCode 588 Design In-Memory File System

12-16

LeetCode 1041 Robot Bounded In Circle

12-16

LeetCode 680 Valid Palindrome II

12-15

LeetCode 811 Subdomain Visit Count

12-15

LeetCode 1326 Minimum Number of Taps to Open to Water a Garden

12-15

LeetCode 055 Jump Game

12-15

LeetCode 045 Jump Game II

12-14

LeetCode 528 Random Pick with Weight

12-14

LeetCode 1396 Design Underground System

12-13

LeetCode 394 Decode String

12-13

LeetCode 560 Subarray Sum Equals K

12-13

LeetCode 031 Next Permutation

12-13

LeetCode

12-13

LeetCode 014 Longest Common Prefix

12-12

LeetCode 002 Add Two Numbers

12-12

LeetCode 2106 Maximum Fruits Harvested After at Most K Steps

12-12

LeetCode 2104 Sum of Subarray Ranges

12-12

LeetCode 907 Sum of Subarray Minimums

12-11

LeetCode 215 Kth Largest Element in an Array

12-11

LeetCode 022 Generate Parentheses

12-11

LeetCode 053 Maximum Subarray

12-11

LeetCode 423 Reconstruct Original Digits from English

12-11

LeetCode 049 Group Anagrams

12-09

LeetCode 134 Gas Station

12-08

LeetCode 224 Basic Calculator

12-08

LeetCode 032 Longest Valid Parentheses

12-08

LeetCode 678 Valid Parenthesis String

12-07

括号题或者字符串运算题

12-07

LeetCode 1249 Minimum Remove to Make Valid Parentheses

12-06

LeetCode 020 Valid Parentheses

12-06

LeetCode 322 Coin Change

12-06

LeetCode 239 Sliding Window Maximum

12-06

LeetCode 863 All Nodes Distance K in Binary Tree

12-06

LeetCode 295 Find Median from Data Stream

12-06

LeetCode 227 Basic Calculator II

12-06

LeetCode 301 Remove Invalid Parentheses

12-05

LeetCode 516 Longest Palindromic Subsequence

12-05

LeetCode 731 My Calendar II

12-05

LeetCode 490 The Maze

12-05

LeetCode 729 My Calendar I

12-05

LeetCode 105 Construct Binary Tree from Preorder and Inorder Traversal

12-05

LeetCode 1235 Maximum Profit in Job Scheduling

12-05

LeetCode 1654 Minimum Jumps to Reach Home

12-05

LeetCode 696 Count Binary Substrings

12-05

LeetCode 1857 Largest Color Value in a Directed Graph

12-05

LeetCode 354 Russian Doll Envelopes

12-05

LeetCode 460 LFU Cache

12-05

LeetCode 973 K Closest Points to Origin

12-05

LeetCode 051 N-Queens

12-05

LeetCode 015 3Sum

12-05

LeetCode 075 Sort Colors

12-05

LeetCode 098 Validate Binary Search Tree

12-05

LeetCode 230 Kth Smallest Element in a BST

12-05

LeetCode 153 Find Minimum in Rotated Sorted Array

12-05

LeetCode 033 Search in Rotated Sorted Array

12-05

LeetCode 278 First Bad Version

12-05

LeetCode 210 Course Schedule II

12-05

LeetCode 198 House Robber

12-05

Two Pointers

12-05

LeetCode 209 Minimum Size Subarray Sum

12-04

LeetCode 373 Find K Pairs with Smallest Sums

12-04

LeetCode 236 Lowest Common Ancestor of a Binary Tree

12-04

LeetCode 291 Word Pattern II

12-03

LeetCode 212 Word Search II

12-03

LeetCode 079 Word Search

12-02

LeetCode 023 Merge k Sorted Lists

12-01

LeetCode 300 Longest Increasing Subsequence

11-30

LeetCode 264 Ugly Number II

11-30

LeetCode 1429 First Unique Number

11-30

LeetCode 380 Insert Delete GetRandom O(1)

11-29

LeetCode 269 Alien Dictionary

11-29

Trie

11-27

LeetCode 1048 Longest String Chain

11-27

DP

11-20

LeetCode 2080 Range Frequency Queries

11-20

LeetCode 2079 Watering Plants

11-15

合并排序

11-14

Heap

11-14

LeetCode 378 Kth Smallest Element in a Sorted Matrix

11-14

LeetCode 2073 Time Needed to Buy Tickets

11-13

LeetCode 2074 Reverse Nodes in Even Length Groups

11-13

LeetCode 275 H-Index II

11-13

算法知识点目录

10-30

Stack

10-21

LeetCode 017 Letter Combinations of a Phone Number

10-21

LeetCode 007 Reverse Integer

07-27

LeetCode 104 Maximum Depth of Binary Tree

07-27

LeetCode 003 Longest Substring Without Repeating Characters

07-27

LeetCode 138 Copy List with Random Pointer

06-07

Python知识点

05-10

LeetCode 368 Largest Divisible Subset

05-10

LeetCode 010 Regular Expression Matching

05-10

LeetCode 044 Wildcard Matching

05-09

记忆性搜索

05-09

LeetCode 140 Word Break II

05-09

LintCode 683 Word Break III

05-09

LeetCode 139 Word Break

05-04

LeetCode 146 LRU Cache

05-03

LeetCode 126 Word Ladder II

05-03

组合

05-03

排列

04-26

快速排序

04-26

BST的非递归和递归中序，前序，后序遍历

04-26

LeetCode 272 Closest Binary Search Tree Value II

04-26

LeetCode 173 Binary Search Tree Iterator

04-21

Binary Search

04-20

LeetCode 1197 Minimum Knight Moves

04-20

LeetCode 127 Word Ladder

04-20

LeetCode 297 Serialize and Deserialize Binary Tree

04-19

LeetCode 133 Clone Graph

03-08

LeetCode 248 Strobogrammatic Number III

02-26

LeetCode 540 Single Element in a Sorted Array

07-12

LeetCode 042 Trapping Rain Water

06-17

Design Distributed ID Generator

06-14

LeetCode 155 Min Stack

05-07

LeetCode 128 Longest Consecutive Sequence

05-01

Design Chime

04-30

Design Tiny URL

04-30

LeetCode 273 Integer to English Words

04-30

LeetCode 493 Reverse Pairs

03-17

LeetCode 019 Remove Nth Node From End of List

03-13

LeetCode 001 Two Sum

02-22

LeetCode 054 Spiral Matrix

01-31

LeetCode 004 Median of Two Sorted Arrays

01-30

LeetCode 006 ZigZag Conversion

01-29

LeetCode 253 Meeting Rooms II

01-29

LeetCode 572 Subtree of Another Tree

01-29

LeetCode 057 Insert Interval

01-28

LeetCode 056 Merge Intervals

01-28

LeetCode 503 Next Greater Element II

01-28

LeetCode 658 Find K Closest Elements

01-28

LeetCode 698 Partition to K Equal Sum Subsets

01-27

LeetCode 416 Partition Equal Subset Sum

01-10

LeetCode 329 Longest Increasing Path in a Matrix

01-09

LeetCode 332 Reconstruct Itinerary

12-31

LeetCode 347 Top K Frequent Elements

12-31

LeetCode 350 Intersection of Two Arrays II

12-31

LeetCode 349 Intersection of Two Arrays

12-31

LeetCode 316 Remove Duplicate Letters

12-28

LeetCode 312 Burst Balloons

12-24

DFS

12-24

LeetCode 123 Best Time to Buy and Sell Stock III

12-24

Union Find

12-23

LeetCode 200 Number of Islands

12-13

LeetCode 124 Binary Tree Maximum Path Sum

12-13

LeetCode 112 Path Sum

12-11

LeetCode 309 Best Time to Buy and Sell Stock with Cooldown

12-04

LeetCode 310 Minimum Height Trees

12-03

拓扑排序

12-03

BFS

11-28

LeetCode 122 Best Time to Buy and Sell Stock II

11-27

LeetCode 121 Best Time to Buy and Sell Stock

11-02

LeetCode Index Page

11-02

LeetCode 557 Reverse Words in a String III

11-02

LeetCode 415 Add Strings

11-02

知识点

11-02

Hello World