After thinking about it, or do a catalog, so that the future looks more convenient, here will record what is brush every day, the order is the date order. Hope to question classification can click here 👉 front brush problem road – directory (question classification). Clicking on the title of the article will jump to the nugget article, and clicking on the title will jump to the LeetCode title details.

  • Front brush problem road -Day0

    There is no

  • Front brush road -Day1

    • The sum of two numbers (Question number 1)
    • Integer inversion (Question Number 7)
    • Palindrome number (Question Number 9)

  • Front brush road -Day2

    • Conversion of Roman numerals to integers (Question number 12)
    • Longest common prefix (Question number 14)

  • Front brush road -Day3

    • List reversal (Question Number 24)

  • Front brush road -Day4

    • Switching nodes in a paironed list (Question number 24)
    • Ring linked list (Question No. 141)

  • Front brush problem road -Day5

    • Implement queue with stack (Question 232)
    • Implementing stacks with queues (Question number 225)

  • Front brush road -Day6

    • Maximum sliding window (Question No. 239)

  • Front brush problem road -Day7

    • Valid epistemic words (Question Number 242)
    • The sum of two numbers (Question number 1)

  • Front brush problem road -Day8

    • Sum of three numbers (Question number 15)

  • Front brush problem road -Day9

    • Verify binary search tree (Question number 98)

  • Front brush problem road -Day10

    • The most recent common ancestor of a binary tree (Question 236)
    • The most recent common ancestor of a binary search tree (Question 235)
    • Pow(x, n)

  • Front brush road -Day11

    • Majority elements (Question No. 169)
    • The best time to buy and sell stocks II (Question 122)

  • Front brush problem road -Day12

    • Sequence traversal of binary trees (Question No. 102)
    • The maximum depth of a binary tree (Question number 104)

  • Front brush road -Day13

    • Minimum depth of binary tree (Question No. 111)
    • Generation of parentheses (Question number 22)

  • Front brush problem road -Day14

    • Valid Sudoku (Question number 36)

  • Front brush problem road -Day15

    • Solve sudoku (Problem number 37)

  • Front brush problem road -Day16

    • Square root of x (Question number 69)

  • Front brush problem road -Day17

    • Implement Trie (Prefix tree) (Question number 208)

  • Front brush road -Day18

    • Word search (Question number 79)

  • Front brush problem road -Day19

    • Word Search II (Question 212)

  • Front brush problem road -Day20

    • Fibonacci series (Question no. 509)
    • Optimal path simple version (Question 62)
    • Optimal path upgrade version (Question Number 63)

  • Front brush problem road -Day21

    • Climb the stairs (Question number 70)

  • Front brush road -Day22

    • Triangle minimum path sum (Question number 120)

  • Front brush road -Day23

    • Maximum product subarray (Question number 152)
    • The best time to buy and sell stocks (Question 121)

  • Front brush problem road -Day24

    • Longest increasing subsequence (Question Number 300)

  • Front brush problem road -Day26

    • Change I (Question No. 322)

  • Front brush problem road -Day27

    • Change II (Question No. 518)

  • Front brush problem road -Day28

    • Edit distance (Question Number 72)

  • Front brush problem road -Day29

    • Number of Islands (Question No. 200)

  • Front brush problem road -Day30

    • Number of provinces (Question No. 547)

  • Front brush road -Day31

    • LRU Cache Mechanism (Question 146)

  • Front brush problem road -Day32

    • Masseuse (question number uncertain)

  • Front brush problem road -Day33

    • Maximum suborder sum (Question 53)
    • Stupid factorial (Question No. 1006)

  • Front brush road -Day34

    • Collecting rain water (Question Number 42)

  • Front brush road -Day35

    • Search for rotation sort array II (Question number 81)

  • Front brush problem road -Day36

    • Minimum distance between nodes in binary search tree (Question Number 783)

  • Front brush road -Day37

    • Search the rotation-sort array (Question 33)

  • Front brush road -Day38

    • Remove element (Question 27)

  • Front brush road -Day39

    • Add two numbers together (Question number 2)

  • Front brush road -Day40

    • Delete the NTH node from the reciprocal of the linked list (Question 19)

  • Front brush road -Day41

    • Scope sum of binary search tree (Question Number 938)

  • Front brush road -Day42

    • Sum of squares (Question Number 633)

  • Front brush road -Day43

    • The Importance of Employees (Question number 690)

  • Front brush road -Day44

    • Brick Wall (Question No. 554)

  • Front brush road -Day45

    • Decoded xOR array (question number 1720)

  • Front brush road -Day46

    • Trees with similar leaves (Question Number 872)

  • Front brush problem road -Day47

    • Cousin nodes of binary trees (Question number 993)

  • Front brush road -Day48

    • The first K high-frequency words (Question No. 682)

  • Front brush road -Day49

    • Weird printer (Question Number 664)

  • Front brush road -Day50

    • Invert the substring between each pair of parentheses (Question number 1190)

  • Front brush problem road -Day51

    • Maximum string with no duplicate characters (Question number 3)

  • Front brush road -Day52

    • Longest return substring (Question No. 5)

  • Front brush road -Day53

    • The container that holds the most water (Question Number 11)

  • Front brush road -Day54

    • Letter combinations for telephone numbers (Question Number 17)

  • Front brush road -Day55

    • Valid parentheses (question number 20)

  • Front brush road -Day56

    • Merge two ordered lists (Question number 21)

  • Front brush road -Day57

    • Merge K ascending linked lists (Question Number 23)

  • Front brush road -Day58

    • Objective and (Question No. 494)

  • Front brush problem road -Day59

    • Longest valid parenthesis (question number 32)

  • Front brush road -Day60

    • Find the first and last position of an element in a sorted array (question 34)

  • Front brush problem road -Day61

    • Find the first and last position of an element in a sorted array (question 34)

  • Front brush road -Day62

    • Full permutation (Question No. 46)

  • Front brush road -Day63

    • The first incorrect version (Question Number 278)

Continuing updates…