| 4300 | 绝世好题 | By Oxer | 1832 | 3372 |
| 4302 | Hdu 5301 Buildings | | 80 | 158 |
| 4303 | 数列 | | 76 | 368 |
| 4307 | Maishroom & Class | | 9 | 18 |
| 4308 | Maishroom & Table | | 22 | 49 |
| 4309 | Maishroom & Mushroom | | 11 | 100 |
| 4310 | 跳蚤 | | 594 | 1315 |
| 4311 | 向量 | | 251 | 656 |
| 4312 | 立方体 | | 40 | 80 |
| 4313 | 三维积木 | | 70 | 124 |
| 4314 | 倍数？倍数！ | | 108 | 160 |
| 4315 | queue | | 45 | 95 |
| 4316 | 小C的独立集 | | 486 | 873 |
| 4317 | Atm的树 | | 173 | 287 |
| 4318 | OSU! | | 1304 | 1626 |
| 4320 | ShangHai2006 Homework | | 593 | 1274 |
| 4321 | queue2 | | 402 | 662 |
| 4322 | 压缩规则 | | 7 | 19 |
| 4324 | tjoi2012 炸弹 | | 6 | 19 |
| 4325 | NOIP2015 斗地主 | | 912 | 1370 |
| 4326 | NOIP2015 运输计划 | | 1473 | 2290 |
| 4327 | JSOI2012 玄武密码 | | 379 | 873 |
| 4330 | JSOI2012 爱之项链 | | 41 | 77 |
| 4336 | BJOI2015 骑士的旅行 | | 204 | 489 |
| 4337 | BJOI2015 树的同构 | | 619 | 1486 |
| 4338 | BJOI2015 糖果 | | 112 | 226 |
| 4339 | BJOI2015 回家的路 | | 7 | 48 |
| 4340 | BJOI2015 隐身术 | | 44 | 144 |
| 4344 | [POI2016]Hydrorozgrywka | 鸣谢Claris | 10 | 71 |
| 4345 | [POI2016]Korale | 鸣谢Claris | 231 | 691 |
| 4346 | [POI2016]Nadajniki | 鸣谢Claris | 74 | 183 |
| 4347 | [POI2016]Nim z utrudnieniem | 鸣谢Claris | 337 | 884 |
| 4348 | [POI2016]Park wodny | 鸣谢Claris | 40 | 111 |
| 4349 | 最小树形图 | | 303 | 708 |
| 4353 | Play with tree | | 60 | 138 |
| 4354 | Magic cube | | 5 | 16 |
| 4355 | Play with sequence | 鸣谢Claris | 149 | 422 |
| 4357 | Point | | 2 | 15 |
| 4358 | permu | By sumix173 | 328 | 929 |
| 4359 | Exp | By sumix173 | 175 | 220 |
| 4360 | achievement | Lydsy3953 Control | 11 | 38 |
| 4361 | isn | | 454 | 882 |
| 4364 | [IOI2014]wall砖墙 | 鸣谢yts1999上传 | 211 | 394 |
| 4365 | [IOI2014]gondola缆车 | 鸣谢yts1999上传 | 0 | 35 |
| 4366 | [IOI2014]friend朋友 | 鸣谢yts1999上传 | 36 | 55 |
| 4367 | [IOI2014]holiday假期 | 鸣谢yts1999上传 | 165 | 546 |
| 4368 | [IOI2015]boxes纪念品盒 | 鸣谢yts1999上传 | 101 | 243 |
| 4370 | [IOI2015]horses马 | 鸣谢yts1999上传 | 37 | 135 |
| 4371 | [IOI2015]sorting排序 | 鸣谢yts1999上传 鸣谢mcfx提供SPJ | 25 | 102 |
| 4372 | 烁烁的游戏 | | 380 | 1025 |
| 4373 | 算术天才⑨与等差数列 | | 535 | 2190 |
| 4389 | ZYB and Trees | jiangshibiao&&gyz_gyz | 43 | 102 |
| 4390 | [Usaco2015 dec]Max Flow | Platinum鸣谢Claris提供译文 | 511 | 768 |
| 4391 | [Usaco2015 dec]High Card Low Card | Platinum鸣谢Claris提供译文 | 209 | 402 |
| 4392 | [Usaco2015 dec]Counting Haybales | Platinum鸣谢Claris提供译文 | 137 | 280 |
| 4393 | [Usaco2015 Dec]Fruit Feast | Gold鸣谢Claris提供译文 | 175 | 283 |
| 4394 | [Usaco2015 dec]Bessie | Gold鸣谢Claris提供译文 | 59 | 147 |
| 4395 | [Usaco2015 dec]Switching on the Lights | Silver鸣谢Claris提供译文 | 118 | 269 |
| 4396 | [Usaco2015 dec]High Card Wins | Silver鸣谢Claris提供译文 | 172 | 272 |
| 4397 | [Usaco2015 dec]Breed Counting | Silver鸣谢Claris提供译文 | 277 | 380 |
| 4398 | 福慧双修 | | 257 | 465 |
| 4399 | 魔法少女LJJ | By liuchenrui | 260 | 1102 |
