| P4129 | P4129 [NEERC 2005 / SHOI2006] 仙人掌 |
| P4135 | P4135 作诗 |
| P4136 | P4136 谁能赢呢? |
| P4137 | P4137 Rmq Problem / mex |
| P4138 | P4138 [JOISC 2014] 挂饰 / Straps |
| P4139 | P4139 上帝与集合的正确用法 |
| P4140 | P4140 [清华集训 2014] 奇数国 |
| P4145 | P4145 上帝造题的七分钟 2 / 花神游历各国 |
| P4146 | P4146 序列终结者 |
| P4147 | P4147 玉蟾宫 |
| P4148 | P4148 简单题 |
| P4149 | P4149 [IOI 2011] Race |
| P4151 | P4151 [WC2011] 最大XOR和路径 |
| P4155 | P4155 [SCOI2015] 国旗计划 |
| P4156 | P4156 [WC2016] 论战捆竹竿 |
| P4157 | P4157 [SCOI2006] 整数划分 |
| P4158 | P4158 [SCOI2009] 粉刷匠 |
| P4159 | P4159 [SCOI2009] 迷路 |
| P4161 | P4161 [SCOI2009] 游戏 |
| P4163 | P4163 [SCOI2007] 排列 |
| P4168 | P4168 [Violet] 蒲公英 |
| P4169 | P4169 [Violet] 天使玩偶/SJY摆棋子 |
| P4170 | P4170 [CQOI2007] 涂色 |
| P4171 | P4171 [JSOI2010] 满汉全席 |
| P4172 | P4172 [WC2006] 水管局长 |
| P4173 | P4173 残缺的字符串 |
| P4174 | P4174 [NOI2006] 最大获利 |
| P4175 | P4175 [CTSC2008] 网络管理 |
| P4178 | P4178 Tree |
| P4180 | P4180 [BJWC2010] 严格次小生成树 |
| P4182 | P4182 [USACO18JAN] Lifeguards P |
| P4183 | P4183 [USACO18JAN] Cow at Large P |
| P4184 | P4184 [USACO18JAN] Sprinklers P |
| P4185 | P4185 [USACO18JAN] MooTube G |
| P4186 | P4186 [USACO18JAN] Cow at Large G |
| P4187 | P4187 [USACO18JAN] Stamp Painting G |
| P4188 | P4188 [USACO18JAN] Lifeguards S |
| P4189 | P4189 [CTSC2010] 星际旅行 |
| P4191 | P4191 [CTSC2010] 性能优化 |
| P4195 | P4195 【模板】扩展 BSGS / exBSGS |
| P4196 | P4196 【模板】半平面交 / [CQOI2006] 凸多边形 |
| P4197 | P4197 [ONTAK2010] Peaks |
| P4198 | P4198 楼房重建 |
| P4199 | P4199 万径人踪灭 |
| P4201 | P4201 [NOI2008] 设计路线 |
| P4202 | P4202 [NOI2008] 奥运物流 |
| P4203 | P4203 [NOI2008] 糖果雨 |
| P4206 | P4206 [NOI2005] 聪聪与可可 |
| P4208 | P4208 [JSOI2008] 最小生成树计数 |
| P4211 | P4211 [LNOI2014] LCA |
| P4212 | P4212 外太空旅行 |
| P4213 | P4213 【模板】杜教筛 |
| P4216 | P4216 [SCOI2015] 情报传递 |
| P4218 | P4218 [CTSC2010] 珠宝商 |
| P4219 | P4219 [BJOI2014] 大融合 |
| P4220 | P4220 [WC2018] 通道 |
| P4221 | P4221 [WC2018] 州区划分 |
| P4224 | P4224 [清华集训 2017] 简单数据结构 |
| P4227 | P4227 [清华集训 2017] 我的生命已如风中残烛 |
| P4228 | P4228 [清华集训 2017] 榕树之心 |
| P4229 | P4229 [清华集训 2017] 某位歌姬的故事 |
| P4231 | P4231 三步必杀 |
| P4233 | P4233 射命丸文的笔记 |
| P4234 | P4234 最小差值生成树 |
| P4238 | P4238 【模板】多项式乘法逆 |
| P4239 | P4239 【模板】任意模数多项式乘法逆 |
| P4240 | P4240 毒瘤之神的考验 |
| P4243 | P4243 [JSOI2009] 等差数列 |
| P4244 | P4244 [SHOI2008] 仙人掌图 II |
| P4245 | P4245 【模板】任意模数多项式乘法 |
| P4246 | P4246 [SHOI2008] 堵塞的交通 |
| P4247 | P4247 [清华集训 2012] 序列操作 |
| P4248 | P4248 [AHOI2013] 差异 |
| P4249 | P4249 [WC2007] 剪刀石头布 |
| P4253 | P4253 [SCOI2015] 小凸玩密室 |
| P4254 | P4254 [JSOI2008] Blue Mary 开公司 |
| P4262 | P4262 [Code+#3] 白金元首与莫斯科 |
| P4264 | P4264 [USACO18FEB] Teleportation S |
| P4265 | P4265 [USACO18FEB] Snow Boots S |
| P4267 | P4267 [USACO18FEB] Taming the Herd G |
| P4271 | P4271 [USACO18FEB] New Barns P |
| P4278 | P4278 带插入区间K小值 |
| P4279 | P4279 [SHOI2008] 小约翰的游戏 |
| P4281 | P4281 [AHOI2008] 紧急集合 / 聚会 |
| P4284 | P4284 [SHOI2014] 概率充电器 |
| P4285 | P4285 [SHOI2008] 汉诺塔 |
| P4287 | P4287 [SHOI2011] 双倍回文 |
| P4288 | P4288 [SHOI2014] 信号增幅仪 |
| P4290 | P4290 [HAOI2008] 玩具取名 |
| P4291 | P4291 [HAOI2008] 排名系统 |
| P4292 | P4292 [WC2010] 重建计划 |
| P4294 | P4294 [WC2008] 游览计划 |
| P4298 | P4298 [CTSC2008] 祭祀 |
| P4299 | P4299 首都 |
| P4301 | P4301 [CQOI2013] 新Nim游戏 |
| P4302 | P4302 [SCOI2003] 字符串折叠 |
| P4303 | P4303 [AHOI2006] 基因匹配 |
| P4304 | P4304 [TJOI2013] 攻击装置 |
| P4309 | P4309 [TJOI2013] 最长上升子序列 |
| P4310 | P4310 绝世好题 |