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2019徐州网络赛 I J M

hdu6464 线段树

hdu6521 吉司机线段树

hdu6468 dfs剪枝 or char数组 or 构造

Educational Codeforces Round 59 (Rated for Div. 2) E 区间dp + 状态定义

Hello 2019 F (莫比乌斯反演 + bitset)

Codeforces Round #549 (Div. 2) F 数形结合 + 凸包(新坑)

Hello 2019 D 素因子贡献法计算期望 + 概率dp + 滚动数组

Codeforces Round #549 (Div. 2) D 数学

Codeforces Round #548 (Div. 2) F splay(新坑) + 思维

Codeforces Round #546 (Div. 2) D 贪心 + 思维

Codeforces Round #538 (Div. 2) E 随机数生成

Codeforces Round #541 (Div. 2) D 并查集 + 拓扑排序

Codeforces Round #541 (Div. 2) E 字符串 + 思维 + 猜性质

Codeforces Round #544 (Div. 3) dp + 双指针

动态开点线段树

Codeforces Round #516 (Div. 2, by Moscow Team Olympiad) D. Labyrinth(重识搜索)

Educational Codeforces Round 53 (Rated for Div. 2) E. Segment Sum

Codeforces Round #519 by Botan Investments F. Make It One

ACM-ICPC 2018 徐州赛区网络预赛 J Maze Designer(最大生成树,倍增lca)