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AtCoder Beginner Contest 218 F - Blocked Roads (最短路径还原 思维)
AtCoder Beginner Contest 218 C - Shapes (模拟)
Nordic Collegiate Programming Contest 2020 D.Damsindistress (dp)
CF1341C. Nastya and Strange Generator(思维 模拟 构造)
SWERC 2020 C. Safe Distance (二分 并查集)
luoguP3958 [NOIP2017 提高组] 奶酪 (并查集)
Educational Codeforces Round 113 (Rated for Div. 2) B. Chess Tournament(思维 构造)
Educational Codeforces Round 113 (Rated for Div. 2) C - Jury Meeting (思维 组合数)
CTU Open Contest 2019 部分题解
CF1567E. Non-Decreasing Dilemma(线段树)
2020-2021 ACM-ICPC, Asia Seoul Regional Contest L. Two Buildings (决策单调性 分治)
AtCoder Beginner Contest 217 F - Make Pair (区间dp)
CF1567D. Expression Evaluation Error(思维 贪心)
CF1567C. Carrying Conundrum(思维)
The 15th Chinese Northeast Collegiate Programming Contest
The 15th Chinese Northeast Collegiate Programming Contest C. Vertex Deletion(树形dp)
CF1181C Flag (dp 思维)
luoguP6327 区间加区间sin和(线段树 sin公式)
AcWing 246. 区间最大公约数 (gcd性质 线段树)
AtCoder Beginner Contest 216 G - 01Sequence (并查集 贪心 树状数组 差分约束)
LDUOJ spj 修改
upc 2021秋组队训练赛第三场 2020 Rocky Mountain Regional Contest
CF1556D. Take a Guess(交互 性质)
upc2021秋组队训练赛第一场 ICPC North Central NA Contest 2020
CF1454 E. Number of Simple Paths (基环树 拓扑排序)
CF1272 E.Nearest Opposite Parity(反向建图+BFS)
数值计算方法-曲线拟合问题-最小二乘法
CF 1156D. 0-1-Tree(树形DP)
【知识总结】dfs序 树链剖分
Codeforces1343D - Constant Palindrome Sum + UPC-鸭子游戏 (差分)
AtCoder Beginner Contest 216 F - Max Sum Counting (降维 背包dp)
AtCoder Beginner Contest 216 D - Pair of Balls (思维建图 拓扑排序判断有向图是否有环)
牛客小白月赛37 G.零一奇迹(思维 枚举)
ICPC Greater New York Region 2020 (模拟)
CF1315 C.Restoring Permutation(构造 二分 贪心)
CF1561D Up the Strip (整除分块 dp 因子)
POJ1269 Intersecting Lines(两直线关系)
AtCoder Beginner Contest 215 E - Chain Contestant (状压dp)
AtCoder Beginner Contest 215 F - Dist Max 2 (二分 单调队列)
CF76.E. Points (贡献 思维)
AtCoder Beginner Contest 215 D - Coprime 2 (质因子分解 gcd)
AcWing 周赛13 3813. 最大路径权值(拓扑排序 DAG上dp)
牛客 城市网络(倍增 思维)
牛客练习赛14 B.区间的连续段(前缀和 倍增)
牛客练习赛87 牛老板 (记忆化搜索)
2018NOIP集训-5 货物运输(倍增)
AtCoder Beginner Contest 133 E - Virus Tree 2(组合数学)
2020ICPC昆明M.Stone Games(主席树)
P4137 Rmq Problem / mex(主席树)
SP10707 COT2 - Count on a tree II(欧拉序 树上莫队)