刷题每日打卡

(Medium) 1100. Find K-Length Substrings With No Repeated Characters
每周一题，滑窗

(Medium) 562. Longest Line of Consecutive One in Matrix
双指针四个方向

(Medium) 792. Number of Matching Subsequences
记录字母位置，二分

(Medium) 47. Permutations II
回溯，记录当前位置和剩余counter

(Medium) 1218. Longest Arithmetic Subsequence of Given Difference
dp，记录以第i个结尾的最长等差数列长度

(Medium) 990. Satisfiability of Equality Equations
并查集，先处理==再判断!=

(Medium) 24. Swap Nodes in Pairs
每日一题，原地两两交换

(Medium) 388. Longest Absolute File Path
栈，遇到文件名更新结果

(Medium) 900. RLE Iterator
指针直接遍历找到相应位置

(Medium) 39. Combination Sum
每日一题，回溯

(Medium) 2018. Check if Word Can Be Placed In Crossword
每行每列双指针检查

(Hard) 664. Strange Printer
dp，首尾相等次数-1

(Hard) 1691. Maximum Height by Stacking Cuboids
dp，按三维度排序，选最长边做高

(Hard) 329. Longest Increasing Path in a Matrix
dfs+memo

(Hard) 552. Student Attendance Record II
dp，空间可以优化到常数

(Hard) 818. Race Car
bfs剪枝

(Hard) 218. The Skyline Problem
分治，双指针合并两边结果

(Medium) 1834. Single-Threaded CPU
按开始时间排序+堆维护可执行任务

(Medium) 652. Find Duplicate Subtrees
先序遍历转化成字符串

(Medium) 1146. Snapshot Array
按key, snap_id存字典，二分查找

(Medium) 2034. Stock Price Fluctuation
维护最大最小堆

(Medium) 2096. Step-By-Step Directions From a Binary Tree Node to Another
LCA+dfs找路径

(Medium) 2115. Find All Possible Recipes from Given Supplies
拓扑排序

(Medium) 324. Wiggle Sort II
排序，反向交叉组合

(Medium) 402. Remove K Digits
贪心，10指针

(Medium) 1966. Binary Searchable Numbers in an Unsorted Array
单调栈

(Hard) 968. Binary Tree Cameras
贪心

(Hard) 1531. String Compression II
dp

(Hard) 1397. Find All Good Strings
dp+kmp

(Hard) 1728. Cat and Mouse II
dp记录猫鼠状态和轮数

(Hard) 727. Minimum Window Subsequence
双指针暴搜

(Medium) 394. Decode String
栈

(Medium) 418. Sentence Screen Fitting
计算有效位数

(Hard) 726. Number of Atoms
维护Counter栈

(Hard) 1240. Tiling a Rectangle with the Fewest Squares
dp，分三种情况，超过给定数据范围不适用

(Hard) 1632. Rank Transform of a Matrix
排序元素，相同值用并查集分组

(Hard) 2167. Minimum Time to Remove All Cars Containing Illegal Goods
转换为找子串1和0数量最大差值

(Hard) 803. Bricks Falling When Hit
并查集，反向增加bricks计算顶层size

(Hard) 1675. Minimize Deviation in Array
每日一题，维护堆从最小的开始

周赛 No.281 tag题刷完 恢复一下手感 Rank 100-
(Easy) 6012. Count Integers With Even Digit Sum
数据范围很小，直接枚举检查

(Medium) 6013. Merge Nodes in Between Zeros
双指针

(Medium) 6014. Construct String With Repeat Limit
贪心，分情况讨论

(Hard) 6015. Count Array Pairs Divisible by K
数学题，对最大公约数存Counter，两两枚举