| 4300 | 绝世好题 | By Oxer | 1849 | 3398 |
| 4302 | Hdu 5301 Buildings | | 80 | 158 |
| 4303 | 数列 | | 77 | 371 |
| 4307 | Maishroom & Class | | 9 | 18 |
| 4308 | Maishroom & Table | | 27 | 62 |
| 4309 | Maishroom & Mushroom | | 11 | 100 |
| 4310 | 跳蚤 | | 610 | 1369 |
| 4311 | 向量 | | 263 | 690 |
| 4312 | 立方体 | | 40 | 80 |
| 4313 | 三维积木 | | 74 | 130 |
| 4314 | 倍数？倍数！ | | 113 | 168 |
| 4315 | queue | | 45 | 95 |
| 4316 | 小C的独立集 | | 529 | 949 |
| 4317 | Atm的树 | | 179 | 294 |
| 4318 | OSU! | | 1349 | 1688 |
| 4320 | ShangHai2006 Homework | | 598 | 1285 |
| 4321 | queue2 | | 413 | 681 |
| 4322 | 压缩规则 | | 7 | 19 |
| 4324 | tjoi2012 炸弹 | | 7 | 20 |
| 4325 | NOIP2015 斗地主 | | 918 | 1376 |
| 4326 | NOIP2015 运输计划 | | 1496 | 2326 |
| 4327 | JSOI2012 玄武密码 | | 400 | 920 |
| 4330 | JSOI2012 爱之项链 | | 41 | 77 |
| 4336 | BJOI2015 骑士的旅行 | | 206 | 491 |
| 4337 | BJOI2015 树的同构 | | 661 | 1567 |
| 4338 | BJOI2015 糖果 | | 113 | 227 |
| 4339 | BJOI2015 回家的路 | | 7 | 48 |
| 4340 | BJOI2015 隐身术 | | 47 | 162 |
| 4344 | [POI2016]Hydrorozgrywka | 鸣谢Claris | 10 | 71 |
| 4345 | [POI2016]Korale | 鸣谢Claris | 251 | 751 |
| 4346 | [POI2016]Nadajniki | 鸣谢Claris | 83 | 204 |
| 4347 | [POI2016]Nim z utrudnieniem | 鸣谢Claris | 350 | 932 |
| 4348 | [POI2016]Park wodny | 鸣谢Claris | 41 | 114 |
| 4349 | 最小树形图 | | 326 | 763 |
| 4353 | Play with tree | | 62 | 143 |
| 4354 | Magic cube | | 5 | 16 |
| 4355 | Play with sequence | 鸣谢Claris | 155 | 433 |
| 4357 | Point | | 2 | 15 |
| 4358 | permu | By sumix173 | 334 | 950 |
| 4359 | Exp | By sumix173 | 176 | 222 |
| 4360 | achievement | Lydsy3953 Control | 11 | 38 |
| 4361 | isn | | 483 | 936 |
| 4364 | [IOI2014]wall砖墙 | 鸣谢yts1999上传 | 219 | 409 |
| 4365 | [IOI2014]gondola缆车 | 鸣谢yts1999上传 | 0 | 35 |
| 4366 | [IOI2014]friend朋友 | 鸣谢yts1999上传 | 37 | 57 |
| 4367 | [IOI2014]holiday假期 | 鸣谢yts1999上传 | 177 | 580 |
| 4368 | [IOI2015]boxes纪念品盒 | 鸣谢yts1999上传 | 102 | 246 |
| 4370 | [IOI2015]horses马 | 鸣谢yts1999上传 | 43 | 145 |
| 4371 | [IOI2015]sorting排序 | 鸣谢yts1999上传 鸣谢mcfx提供SPJ | 33 | 119 |
| 4372 | 烁烁的游戏 | | 400 | 1080 |
| 4373 | 算术天才⑨与等差数列 | | 543 | 2227 |
| 4389 | ZYB and Trees | jiangshibiao&&gyz_gyz | 45 | 106 |
| 4390 | [Usaco2015 dec]Max Flow | Platinum鸣谢Claris提供译文 | 518 | 776 |
| 4391 | [Usaco2015 dec]High Card Low Card | Platinum鸣谢Claris提供译文 | 219 | 435 |
| 4392 | [Usaco2015 dec]Counting Haybales | Platinum鸣谢Claris提供译文 | 138 | 282 |
| 4393 | [Usaco2015 Dec]Fruit Feast | Gold鸣谢Claris提供译文 | 180 | 288 |
| 4394 | [Usaco2015 dec]Bessie | Gold鸣谢Claris提供译文 | 60 | 152 |
| 4395 | [Usaco2015 dec]Switching on the Lights | Silver鸣谢Claris提供译文 | 124 | 279 |
| 4396 | [Usaco2015 dec]High Card Wins | Silver鸣谢Claris提供译文 | 174 | 274 |
| 4397 | [Usaco2015 dec]Breed Counting | Silver鸣谢Claris提供译文 | 280 | 384 |
| 4398 | 福慧双修 | | 266 | 485 |
| 4399 | 魔法少女LJJ | By liuchenrui | 278 | 1244 |
