Problem list

# Name Source Solved
5561 创世纪 进阶指南 图论 基环树 ×2
5516 Subtree Activation USACO 2023 Jan, Platinum ×2
5515 Mana Collection USACO 2023 Jan, Platinum ×2
5514 Tractor Paths USACO 2023 Jan, Platinum ×1
5513 Moo Route USACO 2023 Jan, Gold ×4
5512 Lights Off USACO 2023 Jan, Gold ×19
5511 Find and Replace USACO 2023 Jan, Gold ×2
5510 Moo Route USACO 2023 Jan, Silver ×24
5509 Following Directions USACO 2023 Jan, Silver ×11
5508 Find and Replace USACO 2023 Jan, Silver ×12
5507 Moo Operations USACO 2023 Jan, Bronze ×29
5506 Air Cownditioning II USACO 2023 Jan, Bronze ×27
5505 Leaders USACO 2023 Jan, Bronze ×27
5493 New Time NWRRC 2022 ×10
5492 Mex and Cards NWRRC 2022 ×7
5491 Limited Swaps NWRRC 2022 ×10
5490 K-Shaped Figures NWRRC 2022 ×1
5489 Joking? NWRRC 2022 ×5
5488 IQ Game NWRRC 2022 ×2
5487 Hidden Digits NWRRC 2022 ×1
5486 Greatest Common Divisor NWRRC 2022 ×7
5485 Focusing on Costs NWRRC 2022 ×2
5484 Easily Distinguishable Triangles NWRRC 2022 ×3
5483 Dice Grid NWRRC 2022 ×3
5482 Computer Network NWRRC 2022 ×11
5481 Bricks in the Wall NWRRC 2022 ×8
5480 Absolutely Flat NWRRC 2022 ×10
5479 Missing Vowels NWRRC 2023 ×20
5478 Loops NWRRC 2023 ×4
5477 Kitchen Timer NWRRC 2023 ×18
5476 Jumping Frogs NWRRC 2023 ×19
5475 H-Shaped Figures NWRRC 2023 ×3
5474 Game of Nim NWRRC 2023 ×17
5473 First Solved, Last Coded NWRRC 2023 ×7
5472 Every Queen NWRRC 2023 ×13
5471 Divisibility Trick NWRRC 2023 ×21
5470 Colorful Village NWRRC 2023 ×8
5469 Based Zeros NWRRC 2023 ×16
5468 Axis-Aligned Area NWRRC 2023 ×17
5454 Training, Round 2 NAC 2024 ×5
5453 Square of Triangles NAC 2024 ×4
5452 Shadow Line NAC 2024 ×3
5451 Passport Stamps NAC 2024 ×14
5450 Not Another Constructive! NAC 2024 ×5
5449 MountainCraft NAC 2024 ×5
5448 Manhattan Walk NAC 2024 ×9
5447 Magic Bean NAC 2024 ×4
5446 House Deconstruction NAC 2024 ×5
5445 Dihedral Group NAC 2024 ×12
5444 Comparator NAC 2024 ×4
5442 Arrested Development NAC 2024 ×8
5429 A (Fast) Walk in the Woods ECNA 2023 ×5
5428 Split Decisions ECNA 2023 ×10
5427 Pearls ECNA 2023 ×3
5426 ISBN Conversion ECNA 2023 ×15
5425 Impartial Strings ECNA 2023 ×6
5424 Forest for the Trees ECNA 2023 ×9
5423 Double Up ECNA 2023 ×12
5422 Cornhusker ECNA 2023 ×14
5421 Convex Hull Extension ECNA 2023 ×3
5420 Prof. Fumblemore and the Collatz Conjecture ECNA 2023 ×13
5419 B Road Band ECNA 2023 ×14
5418 A Pivotal Question ECNA 2023 ×18
5417 Workers of the World Unite! Just Not Too Close. ECNA 2020 ×8
5416 Weighty Tomes ECNA 2020 ×17
5415 Simply Sudoku ECNA 2020 ×19
5414 Scholar's Lawn ECNA 2020 ×3
5413 Restroom Monitor ECNA 2020 ×20
5412 A Rank Problem ECNA 2020 ×21
5411 Over the Hill, Part 2 ECNA 2020 ×16
5410 Over the Hill, Part 1 ECNA 2020 ×19
5409 Oreperations Research ECNA 2020 ×11
5408 Math Trade ECNA 2020 ×17
5407 Kinky Word Search ECNA 2020 ×12
5406 All in the Family ECNA 2020 ×12
5405 Tomb Hater ECNA 2021 ×11
5404 Statues ECNA 2021 ×9
5403 Stable Table ECNA 2021 ×6
5402 Recycling ECNA 2021 ×19
5401 Pinned Files ECNA 2021 ×14
5400 Numble ECNA 2021 ×6
5399 Noonerized Spumbers ECNA 2021 ×19
5398 Growing Some Oobleck ECNA 2021 ×7
5397 Gambling Game ECNA 2021 ×9
5396 Downsizing ECNA 2021 ×7
5395 Ball of Whacks ECNA 2021 ×5
5394 Abridged Reading ECNA 2021 ×18
5393 1's For All ECNA 2021 ×32
5103 PSET 2022 Great NY Regional ×5
5102 Caravan Trip Plans 2022 Great NY Regional ×5
5101 You You See What? 2022 Great NY Regional ×3
5100 Linked Triangles 2022 Great NY Regional ×1
5099 Busy As a Bee 2022 Great NY Regional ×7
5098 Clarissa’s Conical Cannolis 2022 Great NY Regional ×3
5097 Counting Pythagorean Triples 2022 Great NY Regional ×5
5096 Quotdoku 2022 Great NY Regional ×1
5095 Sum of Remainders 2022 Great NY Regional ×7
5094 Cornhole 2022 Great NY Regional ×8
5093 棋盘 ×5
5092 追寻光的方向 河南萌新联赛2024第(六)场 ×25

在线比赛


© 2025 FAQs