07-26 并查集讲解 07-26 Manacher(马拉车)算法详解 07-26 二分图详解 07-19 牛客寒假算法基础集训营6 E. 海啸(二维数组+容斥) 07-19 牛客寒假算法基础训练营6 I.wzoi(思维) 07-19 Codeforces 562 C 05-28 Codeforces Round #562 (Div. 2) C. Increasing by Modulo(二分+贪心) 05-28 Codeforces Round #562 (Div. 2) B. Pair(思维) 05-11 Codeforces Round #558 (Div. 2) C. Power Transmission(思维 map+set) 05-11 Codeforces Round #558 (Div. 2) B. Cat Party(思维) 05-04 HDU 3791 二叉搜索树(BST) 05-04 BST的INSERT、FIND、DELETE、遍历 04-24 Educational Codeforces Round 63 (Rated for Div. 2) D. Beautiful Array(dp) 04-07 Codeforces Global Round 2 C. Ramesses and Corner Inversion(思维) 04-07 Codeforces Global Round 2 B. Alyona and a Narrow Fridge(二分) 04-07 Codeforces Global Round 2 A. Ilya and a Colorful Walk(思维) 04-01 Codeforces Round #550 (Div. 3) D. Equalize Them All(思维) 04-01 Codeforces Round #550 (Div. 3) F. Graph Without Long Directed Paths(dfs染色) 03-29 树状数组求逆序数 03-22 Codeforces Round #548 (Div. 2) C. Edgy Trees(思维+dfs) 03-21 Codeforces Round #547 (Div. 3) D. Colored Boots(思维) 03-21 Codeforces Round #547 (Div. 3) C. Polycarp Restores Permutation(思维) 03-20 Codeforces Round #547 (Div. 3) B. Maximal Continuous Rest(思维) 03-20 Codeforces Round #547 (Div. 3) A. Game 23(思维) 03-12 Codeforces Round #546 (Div. 2) C. Nastya Is Transposing Matrices(思维) 03-12 Codeforces Round #546 (Div. 2) B. Nastya Is Playing Computer Games(思维) 03-08 Codeforces Round #544 (Div. 3) F1. Spanning Tree with Maximum Degree(bfs) 03-08 Codeforces Round #544 (Div. 3) D. Zero Quantity Maximization(思维) 03-08 Codeforces Round #544 (Div. 3) C. Balanced Team(upper_bound) 03-08 Codeforces Round #544 (Div. 3) B. Preparation for International Women's Day(思维) 03-08 Codeforces Round #544 (Div. 3) A. Middle of the Contest(思维) 03-07 Educational Codeforces Round 61 (Rated for Div. 2) C. Painting the Fence(思维+前缀和) 03-04 Codeforces Round #543 (Div. 2, based on Technocup 2019 Final Round) B. Mike and Children(思维) 03-04 Codeforces Round #543 (Div. 2, based on Technocup 2019 Final Round) A. Technogoblet of Fire(思维) 02-25 Codeforces Round #542 [Alex Lopashev Thanks-Round] (Div. 2) D1. Toy Train (Simplified)(思维) 02-25 Codeforces Round #542 [Alex Lopashev Thanks-Round] (Div. 2) C. Connect(bfs) 02-25 Codeforces Round #542 [Alex Lopashev Thanks-Round] (Div. 2) B. Two Cakes(思维) 02-25 Codeforces Round #542 [Alex Lopashev Thanks-Round] (Div. 2) A. Be Positive(水题) 02-24 HDU 2767 Proving Equivalences(强连通+缩点) 02-23 Codeforces Round #541 (Div. 2) F. Asya And Kittens(并查集+邻接表) 02-23 Codeforces Round #541 (Div. 2) C. Birthday(思维) 02-23 Codeforces Round #541 (Div. 2) B. Draw!(思维) 02-20 Codeforces Round #540 (Div. 3) E. Yet Another Ball Problem(思维) 02-20 Codeforces Round #540 (Div. 3) D. Coffee and Coursework(二分) 02-20 Codeforces Round #540 (Div. 3) B. Tanya and Candies(思维) 02-20 Codeforces Round #540 (Div. 3) A. Water Buying(思维) 02-19 Educational Codeforces Round 60 (Rated for Div. 2) B. Emotes(思维) 02-19 Educational Codeforces Round 60 (Rated for Div. 2) A. Best Subsegment(思维) 02-19 Educational Codeforces Round 60 (Rated for Div. 2) C. Magic Ship(二分+前缀和) 02-18 HDU 4514 湫湫系列故事——设计风景线(无向图判环+树的直径) 02-18 HDU 2196 Computer(树的直径) 02-18 HDU 4607 Park Visit(树的直径+思维) 02-18 POJ 1849 Two(树的直径+思维) 02-18 POJ 1985 Cow Marathon(树的直径) 02-17 Codeforces Round #539 (Div. 2) C. Sasha and a Bit of Relax(前缀异或和) 02-17 Codeforces Round #539 (Div. 2) B. Sasha and Magnetic Machines(思维) 02-17 Codeforces Round #539 (Div. 2) A. Sasha and His Trip(思维) 02-16 HDU 1269 迷宫城堡(强连通图) 02-16 POJ 1236 Network of Schools(tarjan缩点) 02-15 Codeforces Round #503 (by SIS, Div. 2) C. Elections(思维) 02-14 Codeforces Round #535 (Div. 3) F. MST Unification(最小生成树) 02-14 Codeforces Round #532 (Div. 2) E. Andrew and Taxi(二分+拓扑排序) 02-14 CodeCraft-19 and Codeforces Round #537 (Div. 2) C. Creative Snap(二分+分治) 02-14 CodeCraft-19 and Codeforces Round #537 (Div. 2) B. Average Superhero Gang Power(思维) 02-11 Codeforces Round #538 (Div. 2) B. Yet Another Array Partitioning Task(思维) 02-11 Codeforces Global Round 1 E. Magic Stones(差分数组) 02-02 牛客寒假算法基础集训营6 I. wzoi(思维) 02-02 牛客寒假算法基础集训营6 E. 海啸(二维数组+容斥) 02-01 Codeforces Round #536 (Div. 2) D. Lunar New Year and a Wander(bfs) 02-01 Codeforces Round #536 (Div. 2) C. Lunar New Year and Number Division(思维) 02-01 Codeforces Round #536 (Div. 2) B. Lunar New Year and Food Ordering(思维) 01-31 牛客寒假算法基础集训营5 I. 炫酷镜子(模拟) 01-30 牛客寒假算法基础集训营4 C. Applese走迷宫(bfs) 01-30 牛客寒假算法基础集训营4 F. Applese的QQ群(二分+拓扑排序+dfs) 01-30 牛客寒假算法基础集训营4 G. Applese的毒气炸弹(最小生成树) 01-30 牛客寒假算法基础集训营4 I. Applese的回文串(思维) 01-29 牛客寒假算法基础集训营4 B. Applese走方格(模拟+搜索) 01-28 Educational Codeforces Round 59 (Rated for Div. 2) C. Brutality(思维) 01-28 Educational Codeforces Round 59 (Rated for Div. 2) B. Digital root(思维) 01-28 牛客寒假算法基础集训营3 B. 处女座的比赛资格(DAG上拓扑排序) 01-27 POJ Test for Job(DAG上拓扑排序) 01-26 牛客寒假算法基础集训营3 A. 处女座与线性代数(数学+思维) 01-24 牛客寒假算法基础集训营2 J. 处女座的期末复习(思维) 01-24 牛客寒假算法基础集训营2 G.处女座与复读机(最小编辑距离) 01-24 牛客寒假算法基础集训营2 B. 处女座与cf(模拟) 01-24 Codeforces Round #535 (Div. 3) E1. Array and Segments (Easy version)(思维+暴力) 01-24 Codeforces Round #535 (Div. 3) D. Diverse Garland(思维+暴力) 01-24 Codeforces Round #535 (Div. 3) C. Nice Garland(暴力) 01-24 Codeforces Round #535 (Div. 3) B. Divisors of Two Integers(思维) 01-24 Codeforces Round #535 (Div. 3) A. Two distinct points(水题) 01-23 Codeforces Round #534 (Div. 2) C. Grid game(思维) 01-23 Codeforces Round #534 (Div. 2) B. Game with string(stack具有纪念意义的一题) 01-22 CCPC-Wannafly Winter Camp Day2 A. Erase Numbers II 01-20 HDU 3499 Flight(分层图最短路) 01-19 牛客练习赛38 B. 出题人的女装(条件概率) 01-17 NYOJ 139 我排第几个(康拓展开+康拓展开逆运算) 01-17 POJ 3252 Round Numbers(数位dp+前导零) 01-17 HDU 3555 Bomb(数位dp入门) 01-17 Codeforces Beta Round #51 D. Beautiful numbers(数位dp+思维) 01-17 HDU 2089 不要62(数位dp) 01-17 湖南大学第十四届ACM程序设计新生杯 F. Find the AFei Numbers(数位dp) 01-16 POJ 2155 Matrix(二维树状数组) 01-13 Educational Codeforces Round 58 (Rated for Div. 2) E. Polycarp's New Job(思维) 01-13 Educational Codeforces Round 58 (Rated for Div. 2) B. Accordion(思维) 01-10 Codeforces Round #531 (Div. 3) E. Monotonic Renumeration(思维+差分数组) 01-10 Codeforces Round #531 (Div. 3) D. Balanced Ternary String(模拟) 01-10 Codeforces Round #531 (Div. 3) C. Doors Breaking and Repairing(思维) 01-10 Codeforces Round #531 (Div. 3) B. Array K-Coloring(思维) 01-10 Codeforces Round #531 (Div. 3) A. Integer Sequence Dividing(找规律) 01-09 SPOJ DETER3 Find The Determinant III(行列式求值取模) 01-09 UVA 10766 Organising the Organisation(生成树计数) 01-09 SPOJ HIGH Highways(生成树计数模板题) 01-09 HDU 4009 Transfer water(最小树形图+虚根) 01-08 HDU 2121 Ice_cream’s world II(最小树形图+虚根) 01-08 UVA 11183 Teen Girl Squad(最小树形图模板) 01-08 POJ 3164 Command Network(最小树形图) 01-08 快速乘 01-07 UVA 10462 Is There A Second Way Left?(带重边次小生成树) 01-07 HDU 4081 (次小生成树变形) 01-07 UVA 10600 ACM Contest and Blackout(次小生成树) 01-06 Codeforces Round #402 (Div. 2) D. String Game(二分) 01-06 Codeforces Round #530 (Div. 2) C. Postcard(构造) 01-05 Hello 2019 C. Yuhao and a Parenthesis(思维) 01-05 Hello 2019 B. Petr and a Combination Lock(二进制枚举或dfs) 01-05 牛客练习赛36 A. Rabbit的字符串(字符串最小表示法+模拟)