F
没什么思路的题：
P4767 [IOI2000]邮局
CF1197E Culture Code
P5330 [SNOI2019]数论
P5331 [SNOI2019]通信
P4389 付公主的背包
P5467 [PKUSC2018]PKUSC
CF10E Greedy Change
P5539 【XR-3】Unknown Mother-Goose
P2109 [NOI2007]生成树计数
P1852 跳跳棋
P5293 [HNOI2019]白兔之舞
P5644 [PKUWC2018]猎人杀
P4348 [CERC2015]Cow Confinement
CF1119H Triple
P4931 [MtOI2018]情侣？给我烧了！（加强版）
P3059 [USACO12NOV]Concurrently Balanced Strings G
P3736 [HAOI2016]字符合并
CF914G Sum the Fibonacci
P2495 [SDOI2011]消耗战
CF553E Kyoya and Train
CF741D Arpa’s letter-marked tree and Mehrdad’s Dokhtar-kosh paths
P4705 玩游戏
P5620 [DBOI2019]捡币
P3600 随机数生成器
P4464 [国家集训队]JZPKIL
SP20173 DIVCNT2 - Counting Divisors (square)
P4458 [BJOI2018]链上二次求和
P5825 排列计数
P3158 [CQOI2011]放棋子
P2167 [SDOI2009]Bill的挑战
P4299 首都
P6199 [EER1]河童重工
CF566C Logistical Questions
P2305 [NOI2014]购票
P5320 [BJOI2019]勘破神机
P2012 拯救世界2
UVA1214 Manhattan Wiring
P3702 [SDOI2017]序列计数
P4916 [MtOI2018]魔力环
CF913F Strongly Connected Tournament
CF512D Fox And Travelling
CF559E Gerald and Path
P3270 [JLOI2016]成绩比较
CF643G Choosing Ads