07-19 E. Palindrome-less Arrays 07-19 riXyqBXkIs 07-19 1167E - Range Deleting 双指针 07-18 笛卡尔树 07-18 1167E - Range Deleting 双指针 07-14 E. Vus the Cossack and a Field (求一有规律矩形区域值) (有一结论待证) 05-10 959F - Mahmoud and Ehab and yet another xor task xor+dp(递推形)+离线 05-10 # E. Mahmoud and Ehab and the xor-MST dp/数学+找规律+xor 05-09 D. Mahmoud and Ehab and another array construction task 因子分界模板+贪心+数学 05-02 Sliding Window POJ - 2823 单调队列模板题 05-01 D. Lunar New Year and a Wander bfs+优先队列 05-01 E. Pavel and Triangles dp+问题转化 05-01 C. Grid game 思维+问题转化 05-01 B. Game with string 思维问题转化 05-01 D. Game with modulo 交互题（取余（膜）性质）附带a mod b<a/2证明 05-01 G. Vasya and Maximum Profit（待补题解） 05-01 Codeforces Round #530 (Div. 2) D. Sum in the tree 树上贪心 05-01 C. Polygon for the Angle 几何数学 05-01 D. Easy Problem dp(有衔接关系的dp(类似于分类讨论) ) 05-01 D. Minimum Diameter Tree 思维+猜结论 05-01 C. The Fair Nut and String 递推分段形dp 05-01 Codeforces Round #526 (Div. 2) D. The Fair Nut and the Best Path 树上dp 05-01 Codeforces Round #525 (Div. 2) C. Ehab and a 2-operation task 数学 mod运算的性质 04-29 Codeforces Round #525 (Div. 2) E. Ehab and a component choosing problem 数学 04-29 Codeforces Round #553 (Div. 2) C. Problem for Nazar 数学 04-29 Codeforces Round #524 (Div. 2) C. Masha and two friends 几何：判断矩形是否相交以及相交矩形坐标 04-29 Codeforces Round #553 (Div. 2) D. Stas and the Queue at the Buffet 贪心+公式转化 04-29 Codeforces Round #553 (Div. 2)B. Dima and a Bad XOR 思维构造+异或警告 04-29 Codeforces Round #523 (Div. 2) D. TV Shows 模拟（多重集 先把所有区间加入多重集合）+贪心+二分 04-29 Educational Codeforces Round 63 (Rated for Div. 2) B. Game with Telephone Numbers 博弈思维+模拟+贪心思维 04-29 Educational Codeforces Round 63 (Rated for Div. 2) C. Alarm Clocks Everywhere gcd 04-29 Educational Codeforces Round 63 (Rated for Div. 2) D. Beautiful Array 分类讨论连续递推dp 04-29 Codeforces Round #522 (Div. 2, based on Technocup 2019 Elimination Round 3)B. Personalized Cup 04-29 Codeforces Round #522 (Div. 2, based on Technocup 2019 Elimination Round 3) C. Playing Piano 04-29 Codeforces Round #522 (Div. 2, based on Technocup 2019 Elimination Round 3) D. Barcelonian Distance 几何代数（简单） 04-29 Codeforces Round #520 (Div. 2) B. Math 唯一分解定理+贪心 04-26 code runner 使用教程 04-26 vscode 配置c++ 04-22 C. Multiplicity 简单数论+dp（dp[i][j]=dp[i-1][j-1]+dp[i-1][j] 前面序列要满足才能构成后面序列）+sort 04-18 D. Maximum Diameter Graph 贪心+图论+模拟 04-18 C. Multi-Subject Competition 思维+前缀和+填表加减复杂度（复杂度计算错误） 04-18 B. Vova and Trophies 字符串预处理+思维+贪心 04-16 C. New Year and Rating 差分方程 思维 04-12 Codeforces Round #542 [Alex Lopashev Thanks-Round] (Div. 2) 04-03 一道水题，总过不去 04-01 Codeforces Round #549 (Div. 2) 03-31 P2495 [SDOI2011]消耗战 lca倍增+虚树+树形dp 03-26 Educational Codeforces Round 60 (Rated for Div. 2) 03-26 Codeforces Round #546 (Div. 2) 03-24 Educational Codeforces Round 62 (Rated for Div. 2) 03-23 D. Flood Fill 区间DP 或lcs匹配 03-23 Codeforces Round #543 (Div. 2, based on Technocup 2019 Final Round) 03-23 Educational Codeforces Round 61 (Rated for Div. 2) 03-18 bug 03-17 Power Network POJ - 1459 网络流 DInic 模板 03-17 Codeforces Round #544 (Div. 3) 03-17 Codeforces Round #545 (Div. 2) 03-02 F. Asya And Kittens 并查集维护链表 03-02 vim复制粘帖代码 02-03 M - 约会安排 HDU - 4553 线段树 （最长连续段） 02-02 L - Vases and Flowers HDU - 4614 线段树+二分 01-30 K - Transformation HDU - 4578 线段树经典题（好题） 01-30 待补 01-24 I - Tunnel Warfare HDU - 1540 线段树最大连续区间 01-22 牛客寒假算法训练1 D 欧拉（容斥） 01-22 欧拉降幂（待补） 01-22 容斥证明及模板 01-22 G - Balanced Lineup POJ - 3264 线段树最大最小值区间查询模版题 01-22 F - Count the Colors ZOJ - 1610 线段树染色（染区间映射） 01-22 E - Just a Hook HDU - 1698 线段树区间修改区间和模版题 01-22 D - Mayor's posters POJ - 2528 离散化+线段树 区间修改单点查询 01-19 B - I Hate It HDU - 1754 线段树区间最大值板子（单点更新，区间最大） 01-19 A - 敌兵布阵 HDU - 1166 线段树（多点修改当单点修改） 01-19 C - A Simple Problem with Integers POJ - 3468 线段树模版（区间查询区间修改） 01-18 Biorhythms POJ - 1006 中国剩余定理 01-18 C Looooops POJ - 2115 拓展gcd 有一个定理待补（） 01-16 Semi-prime H-numbers POJ - 3292 打表（算复杂度） 01-16 The Embarrassed Cryptographer POJ - 2635 同余模+高精度处理 +线性欧拉筛（每n位一起处理） 01-16 Basic remains POJ - 2305 同余模 高精度处理 01-16 Dirichlet's Theorem on Arithmetic Progressions POJ - 3006 线性欧拉筛 01-16 Goldbach's Conjecture POJ - 2262 线性欧拉筛水题 哥德巴赫猜想 01-16 Sum of Consecutive Prime Numbers POJ - 2739 线性欧拉筛（线性欧拉筛证明） 01-15 Jury Compromise POJ - 1015 dp （标答有误）背包思想 01-14 Paths on a Grid POJ - 1942 组合数学 （组合数的快速计算） 01-14 Code POJ - 1850 组合数学 01-14 Number Sequence POJ - 1019 递推 数学 01-12 Joseph POJ - 1012 约瑟夫环递推 01-12 Longest Ordered Subsequence POJ - 2533 最长上升子序列dp 01-12 Pearls POJ - 1260 dp 01-12 复习 LIS nlogn 01-12 The Cow Lexicon POJ - 3267 dp 01-12 Dividing POJ - 1014 多重背包二进制优化 01-12 Cash Machine POJ - 1276 多重背包二进制优化 01-11 Girls and Boys HDU - 1068 二分图匹配（匈牙利）+最大独立集证明 01-11 Colored Sticks POJ - 2513 并查集+欧拉通路+字典树hash 01-10 Repository HDU - 2846 字典树 01-10 Phone List HDU - 1671 字典树 01-10 Hat’s Words HDU - 1247 字典树 01-10 HDU1800 字典树写法 01-10 HDU1075 字典树板子题 01-10 HDU1251 字典树板子题