| #5301 | Modulo Ruins the LegendHangzhou Regional 2022 | |
| #5302 | Useful AlgorithmHangzhou Regional 2022 | |
| #5303 | No Bug No GameHangzhou Regional 2022 | |
| #5304 | Money GameHangzhou Regional 2022 | |
| #5305 | Oscar is All You NeedHangzhou Regional 2022 | |
| #5306 | Da Mi Lao Shi Ai Kan DeHangzhou Regional 2022 | |
| #5307 | Subgraph IsomorphismHangzhou Regional 2022 | |
| #5308 | RPG Pro LeagueHangzhou Regional 2022 | |
| #5309 | Guess Cycle LengthHangzhou Regional 2022Interactive | |
| #5310 | PaintingHangzhou Regional 2022 | |
| #5311 | Master of BothHangzhou Regional 2022 | |
| #5312 | Levenshtein DistanceHangzhou Regional 2022 | |
| #5313 | Please Save PigelandHangzhou Regional 2022 | |
| #5314 | Zombie's Treasure ChestShanghai Regional 2011 | |
| #5315 | Yummy Triangular PizzaShanghai Regional 2011 | |
| #5316 | Xavier is Learning to CountShanghai Regional 2011 | |
| #5317 | Winmine.exeShanghai Regional 2011 | |
| #5318 | Very Boring HomeworkShanghai Regional 2011 | |
| #5319 | Universal Question Answering SystemShanghai Regional 2011 | |
| #5320 | Triangles and QuadrangleShanghai Regional 2011 | |
| #5321 | Share the CakesShanghai Regional 2011 | |
| #5322 | Revenge of FibonacciShanghai Regional 2011 | |
| #5323 | Quelling BladeShanghai Regional 2011 | |
| #5336 | BreakdownUSACO 2022 December Platinum | |
| #5337 | Making FriendsUSACO 2022 December Platinum | |
| #5338 | PalindromesUSACO 2022 December Platinum | |
| #5339 | Mixing ColoursSWERC 2013 | |
| #5340 | It Can Be ArrangedSWERC 2013 | |
| #5341 | Shopping MallsSWERC 2013 | |
| #5342 | Decoding the HallwaySWERC 2013 | |
| #5343 | Joe is learning to speakSWERC 2013 | |
| #5344 | Odd and Even ZeroesSWERC 2013 | |
| #5345 | VivoParcSWERC 2013 | |
| #5346 | Binary TreeSWERC 2013 | |
| #5347 | Trending TopicSWERC 2013 | |
| #5348 | Cleaning the HallwaySWERC 2013 | |
| #5349 | 密钥CTSC 2017 Day 1CTS 2017 Day 1 | |
| #5350 | 网络CTSC 2017 Day 1CTS 2017 Day 1 | |
| #5351 | 游戏CTSC 2017 Day 1CTS 2017 Day 1 | |
| #5352 | 吉夫特CTSC 2017 Day 2CTS 2017 Day 2 | |
| #5353 | 最长上升子序列CTSC 2017 Day 2CTS 2017 Day 2 | |
| #5354 | 投影CTSC 2017 Day 2CTS 2017 Day 2 | |
| #5355 | 多边形上天北大集训 2018 Day 1CTT 2018 Day 1 | |
| #5356 | esperar北大集训 2018 Day 1CTT 2018 Day 1 | |
| #5357 | 芒果冰加了空气北大集训 2018 Day 1CTT 2018 Day 1 | |
| #5358 | 宝石游戏北大集训 2018 Day 2CTT 2018 Day 2 | |
| #5359 | 面国建设北大集训 2018 Day 2CTT 2018 Day 2 | |
| #5360 | Wechat北大集训 2018 Day 2CTT 2018 Day 2 | |
| #5361 | 土豆评测机北大集训 2018 Day 3CTT 2018 Day 3 | |
| #5362 | I'm always close to you北大集训 2018 Day 3CTT 2018 Day 3 | |
| #5363 | ZYB 的游览计划北大集训 2018 Day 3CTT 2018 Day 3 | |
| #5364 | 面国漫步北大集训 2018 Day 4CTT 2018 Day 4 | |
| #5365 | 修路北大集训 2018 Day 4CTT 2018 Day 4 | |
| #5366 | 面国超算北大集训 2018 Day 4CTT 2018 Day 4InteractiveUnavailable | |
| #5367 | 递增树列北大集训 2019 Day 1CTT 2019 Day 1 | |
| #5368 | 异世界的文章分割者北大集训 2019 Day 1CTT 2019 Day 1 | |
| #5369 | 时间旅行北大集训 2019 Day 1CTT 2019 Day 1 | |
| #5370 | 循环序列北大集训 2019 Day 2CTT 2019 Day 2 | |
| #5371 | Matrix北大集训 2019 Day 2CTT 2019 Day 2 | |
| #5372 | 杀蚂蚁简单版北大集训 2019 Day 2CTT 2019 Day 2 | |
| #5373 | 投影对称北大集训 2019 Day 3CTT 2019 Day 3 | |
| #5374 | 数圈北大集训 2019 Day 3CTT 2019 Day 3 | |
| #5375 | Search北大集训 2019 Day 3CTT 2019 Day 3Interactive | |
| #5376 | xor北大集训 2019 Day 4CTT 2019 Day 4 | |
| #5377 | $N$ 门问题北大集训 2019 Day 4CTT 2019 Day 4 | |
| #5378 | 匹配问题北大集训 2019 Day 4CTT 2019 Day 4 | |
| #5379 | Adjoin the NetworksNCPC 2015 | |
| #5380 | Bell RingingNCPC 2015 | |
| #5381 | Cryptographer's ConundrumNCPC 2015 | |
| #5382 | Disastrous DowntimeNCPC 2015 | |
| #5383 | Entertainment BoxNCPC 2015 | |
| #5384 | Floppy MusicNCPC 2015 | |
| #5385 | Goblin Garden GuardsNCPC 2015 | |
| #5386 | Hero PowerNCPC 2015 | |
| #5387 | iCarNCPC 2015 | |
| #5388 | Just a QuizNCPC 2015 | |