ID Problem Show tags Hide tags AC / Tried Difficulty
12602 P12822  [NERC 2021] Interactive Treasure Hunt 0 / 0 4
12635 P12858  [NERC 2020 Online] Interactive Knockout 0 / 0 (None)
12639 P12866  [JOI Open 2025] 抽奖 / Lottery 0 / 0 6
12643 P12867  [JOI Open 2025] 心灵感应 / Telepathy 0 / 0 7
12679 P12908  [NERC 2020] Is It Rated? 0 / 0 6
12738 P12942  [NERC 2019] Intriguing Selection 0 / 0 6
12767 P12965  [GCJ Farewell Round #4] Ring-Preserving Networks 0 / 0 6
12778 P12983  [GCJ 2022 Qualification] Twisty Little Passages 0 / 0 6
12782 P12985  [GCJ 2022 #1A] Equal Sum 0 / 0 5
12788 P12989  [GCJ 2022 #1B] ASeDatAb 0 / 0 6
12796 P12997  [GCJ 2022 #3] Revenge of GoroSort 0 / 0 5
12799 P13000  [GCJ 2022 #3] Win As Second 0 / 0 7
12809 P13024  [GCJ 2021 Qualification] Median Sort 0 / 0 5
12820 P13031  [GCJ 2021 #1B] Digit Blocks 0 / 0 5
12836 P13035  [GCJ 2021 #2] Minimum Sort 0 / 0 3
12846 P13045  [GCJ 2021 Finals] Ropes 0 / 0 7
12856 P13051  [GCJ 2020 Qualification] ESAb ATAd 0 / 0 5
12862 P13057  [GCJ 2020 #1B] Blindfolded Bullseye 0 / 0 5
12873 P13068  [GCJ 2020 #3] Pen Testing 0 / 0 6
12879 P13079  [NOISG 2019] Shuffle【交互题待配置】 0 / 0 (None)
12889 P13105  [GCJ 2019 Qualification] Dat Bae 0 / 0 5
12891 P13107  [GCJ 2019 #1A] Golf Gophers 0 / 0 5
12894 P13110  [GCJ 2019 #1B] Draupnir 0 / 0 4
12897 P13113  [GCJ 2019 #1C] Power Arrangers 0 / 0 4
12900 P13116  [GCJ 2019 #2] Pottery Lottery 0 / 0 5
12903 P13119  [GCJ 2019 #3] Zillionim 0 / 0 5
12907 P13123  [GCJ 2019 Finals] Board Meeting [Can't Judge yet] 0 / 0 6
13136 P13134  [GCJ 2018 Qualification] Go, Gopher! 0 / 0 2
13145 P13143  [GCJ 2018 #1C] Lollipop Shop 0 / 0 4
13152 P13150  [GCJ 2018 #3] Name-Preserving Network 0 / 0 6
13159 P13155  [GCJ 2018 Finals] Go, Gophers! 0 / 0 6
13344 P13340  [EGOI 2025] Dark Ride 0 / 0 5
13350 P13346  [EGOI 2025] Laser Strike 0 / 0 7
13039 P13502  [OOI 2024] Draw Polygon Lines 0 / 0 7
13537 P13533  [OOI 2023] 寻找假币 0 / 0 7
13550 P13535  [IOI 2025] Souvenirs 0 / 0 6
13551 P13536  [IOI 2025] 神话三峰(triples)(Part 1) 0 / 0 6
13552 P13537  [IOI 2025] World Map 0 / 0 7
13553 P13538  [IOI 2025] Festival 0 / 0 7
13554 P13539  [IOI 2025] Migrations 0 / 0 7
13555 P13540  [IOI 2025] Obstacles for a Llama 0 / 0 7
13565 P13553  [IOI 2025] 神话三峰(triples)(Part 2) 0 / 0 7
13592 P13589  [NWRRC 2023] Intersegment Activation 0 / 0 5
13046 P13596  『GTOI - 1C』Top Miner 0 / 0 5
13611 P13612  [IOI 2018] combo 组合动作 0 / 0 5
13612 P13613  [IOI 2018] doll 机械娃娃 0 / 0 7
13613 P13614  [IOI 2018] highway 高速公路收费 0 / 0 7
13623 P13636  [NWRRC 2021] Imprecise Permutation Sort 0 / 0 (None)
13069 P13642  EERT 0 / 0 4
13032 P13643  Guess 0 / 0 5
13540 P13652  [CERC 2020] Bank Robbery 0 / 0 6
13318 P13690  [CEOI 2025] boardgames 0 / 0 7
13317 P13691  [CEOI 2025] highest 0 / 0 6
13319 P13692  [CEOI 2025] lawnmower 0 / 0 6
13671 P13693  [CEOI 2025] Equal Mex 0 / 0 6
13672 P13694  [CEOI 2025] Splits 0 / 0 7
13673 P13695  [CEOI 2025] theseus 0 / 0 7
13663 P13711  [NWERC 2023] Lateral Damage 0 / 0 2
13688 P13720  [GCPC 2024] Even Odd Game 0 / 0 5
13713 P13746  [NWERC 2024] Hash Collision 0 / 0 4
13025 P13775  「o.OI R2」nextmin 0 / 0 2
13745 P13782  [eJOI 2022] Where Is the Root? 0 / 0 5
13802 P13853  [CERC 2023] Interactive Reconstruction[Can't judge yet] 0 / 0 6
13755 P13919  [PO Final 2024] 黑暗密室 / The Dark Chambers of Chalmers 0 / 0 7
13807 P13926  [POKATT 2024] 猫和老鼠 / KATT:s and rats 0 / 0 (None)
13911 P13989  [PO Final 2023] 锯木 / The Sawmill 0 / 0 (None)
13941 P13999  [eJOI 2025] Collecting Diamonds 0 / 0 5
13942 P14000  [eJOI 2025] Grid 0 / 0 3
13943 P14001  [eJOI 2025] Prison 0 / 0 6
13944 P14002  [eJOI 2025] Navigation 0 / 0 7
13945 P14003  [eJOI 2025] Reactions 0 / 0 5
13946 P14004  [eJOI 2025] Vacation 0 / 0 5
12998 P14007  「florr IO Round 1」查询游戏 0 / 0 5
13948 P14012  [POCamp 2023] 枫树 / Maple Tree 0 / 0 6
13957 P14020  [ICPC 2024 Nanjing R] 二叉树 0 / 0 4
13084 P14032  【MX-X20-T6】「FAOI-R7」超级电话 0 / 0 6
13947 P14033  【MX-X20-T7】「FAOI-R7」子集乘积(subset) 0 / 0 7
13983 P14034  [PAIO 2025] Cards 0 / 0 2
13984 P14035  [PAIO 2025] GCD 0 / 0 5
13985 P14036  [PAIO 2025] Rooks 0 / 0 4
13987 P14037  [PAIO 2025] XOR multiset 0 / 0 5
13988 P14038  [PAIO 2025] Adventure Plan 0 / 0 5
13989 P14039  [PAIO 2025] Cake 0 / 0 1
13990 P14040  [PAIO 2025] Exhibition 0 / 0 4
13991 P14041  [PAIO 2025] Towers 0 / 0 1
13080 P14083  「CZOI-R7」括号 0 / 0 4
14002 P14099  [POCamp 2022] 一安在?2 / Where's Waldo? 0 / 0 7
13664 P14134  【MX-X22-T5】「TPOI-4E」Get MiN? Get MeX! 0 / 0 5
14088 P14195  [ICPC 2024 Hangzhou R] Identify Chord 0 / 0 6
13111 P14204  [JOIST 2023] 最后之战 / The Last Battle 0 / 0 7
14136 P14210  [ROI 2016 Day2] DNA 解码 0 / 0 4
14130 P14216  [COI 2010] 机器人 / ROBOTI 0 / 0 5
14110 P14227  [ICPC 2024 Kunming I] 排列 0 / 0 6
14149 P14250  [集训队互测 2025] 携春同行 0 / 0 7
14166 P14274  [ROI 2014 Day1] Petya 与机器人 0 / 0 5
14180 P14288  [ICPC 2025 WF] Slot Machine【暂无交互库】 0 / 0 (None)
12959 P14319  「ALFR Round 11」C1 开关灯 (switch) (ez ver.) 0 / 0 3
12961 P14320  「ALFR Round 11」C2 开关灯 (switch) (hd ver.) 0 / 0 5
13012 P14323  「ALFR Round 11」F Permutation 0 / 0 7
14215 P14341  [JOISC 2019] 海狸的会面 / Meetings 0 / 0 6

Categories

Lucky

Pick a problem randomly based on the current filter.