每天1-3题 坚持了两年 立帖继续打卡

374. Guess Number Higher or Lower        307. Range Sum Query - Mutable        363. Max Sum of Rectangle No Larger Than K        202. Happy Number        240. Search a 2D Matrix II        297. Serialize and Deserialize Binary Tree

509. Fibonacci Number        562. Longest Line of Consecutive One in Matrix        517. Super Washing Machines

724. Find Pivot Index        751. IP to CIDR        730. Count Different Palindromic Subsequences        696. Count Binary Substrings        676. Implement Magic Dictionary        699. Falling Squares

171. Excel Sheet Column Number        105. Construct Binary Tree from Preorder and Inorder Traversal        188. Best Time to Buy and Sell Stock IV        1920. Build Array from Permutation        1914. Cyclically Rotating a Grid        1916. Count Ways to Build Rooms in an Ant Colony        1837. Sum of Digits in Base K        1860. Incremental Memory Leak        1872. Stone Game VIII        1773. Count Items Matching a Rule        1764. Form Array by Concatenating Subarrays of Another Array        1782. Count Pairs Of Nodes

563. Binary Tree Tilt        524. Longest Word in Dictionary through Deleting        546. Remove Boxes        492. Construct the Rectangle        470. Implement Rand10() Using Rand7()        465. Optimal Account Balancing        349. Intersection of Two Arrays        341. Flatten Nested List Iterator        352. Data Stream as Disjoint Intervals        225. Implement Stack using Queues        200. Number of Islands        297. Serialize and Deserialize Binary Tree

671. Second Minimum Node In a Binary Tree        625. Minimum Factorization        600. Non-negative Integers without Consecutive Ones

914. X of a Kind in a Deck of Cards        984. String Without AAA or BBB        956. Tallest Billboard        888. Fair Candy Swap        820. Short Encoding of Words        810. Chalkboard XOR Game

1103. Distribute Candies to People        1169. Invalid Transactions        1106. Parsing A Boolean Expression        1018. Binary Prefix Divisible By 5        1026. Maximum Difference Between Node and Ancestor        1044. Longest Duplicate Substring

1365. How Many Numbers Are Smaller Than the Current Number        1318. Minimum Flips to Make a OR b Equal to c        1316. Distinct Echo Substrings        1287. Element Appearing More Than 25% In Sorted Array        1276. Number of Burgers with No Waste of Ingredients        1259. Handshakes That Don't Cross

1678. Goal Parser Interpretation        1616. Split Two Strings to Make Palindrome        1627. Graph Connectivity With Threshold        1592. Rearrange Spaces Between Words        1590. Make Sum Divisible by P        1520. Maximum Number of Non-Overlapping Substrings