ID Problem Show tags Hide tags AC / Tried Difficulty
15839 P15401   [NOISG 2026 Prelim] Airplane 2 0 / 0 6
16670 P15407   [NOISG 2026 Prelim] 米浴的数据结构课(民间数据) 0 / 0 9
14582 P15426   Time to Heal 0 / 0 (None)
15417 P15437   [蓝桥杯 2025 国 Python B] 机器人充电站规划 0 / 0 6
15317 P15446   「IXOI R1」BA BA 博弈 0 / 0 8
14651 P15551   Get MiN? Get MeX! 加强版 0 / 0 9
15390 P15566   [COCI 2025/2026 #5] 重量 / Težina 0 / 0 5
15668 P15794   【MX-J28-T1】「Cfz Round 8」Sqrt Problem 0 / 0 3
15669 P15795   【MX-J28-T2】「Cfz Round 8」Update Problem 0 / 0 3
15857 P15799   [GESP202603 五级] 找数 0 / 0 3
15864 P15809   [JOI 2013 Final] JOIOI の塔 0 / 0 6
15869 P15813   [JOI 2014 Final] バームクーヘン 0 / 0 6
15881 P15823   [JOI Open 2013] Watching 0 / 0 6
15931 P15880   [ICPC 2026 NAC] Friend Meetup 0 / 0 6
15945 P15892   [COCI 2025/2026 #6] Učionica 0 / 0 7
15950 P15897   [TOPC 2025] Explosive Slabstones Rearrangement 0 / 0 6
15955 P15902   [TOPC 2025] Gas Station 0 / 0 6
15978 P15924   [TOPC 2023] Heap Structure 0 / 0 6
15795 P15974   「RedStone OI R10 C」切蛋糕 0 / 0 6
16116 P16126   [USTCPC 2026] Note Offset Adjustment 0 / 0 6
16191 P16156   [ICPC 2016 NAIPC] Programming Team 0 / 0 7
16216 P16181   [ICPC 2014 NAIPC] Reconnaissance 0 / 0 5
16039 P16201   【MX-S13-T1】旋转工艺 0 / 0 5
16266 P16227   [蓝桥杯 2026 省 A] 切割木材 0 / 0 5
16278 P16239   [蓝桥杯 2026 省 B] 足球训练 0 / 0 6
15773 P16327   线段 0 / 0 6
15794 P16328   夜曲 0 / 0 6
16363 P16348   「MierOI R1」Eternal (Hard ver.) 0 / 0 9
16396 P16374   [IATI 2026] Arithmetic Progression 0 / 0 (None)
16326 P16378   [NordicOI 2026] Alarms 0 / 0 5
16343 P16393   [ECUSTPC 2026 Spring] 聚光灯下 0 / 0 7
15767 P16425   「YLLOI-R4-T1」珊瑚海 0 / 0 3
15811 P16431   玉馔逢市 0 / 0 6
16429 P16448   [XJTUPC 2026] Triple Mirror: The Harmony of Repetition 0 / 0 6
16443 P16457   [UOI 2026] Guess the Number 0 / 0 8
15775 P16497   东风归故里,托此报微酬 0 / 0 6
16492 P16515   [GKS 2015 #D] gBalloon 0 / 0 6
16498 P16521   [GKS 2015 #E] Sums of Sums 0 / 0 6
16543 P16569   [ICPC 2026 APC] Time Display Stickers 0 / 0 5
16551 P16578   [GKS 2016 #A] Jane's Flower Shop 0 / 0 5
16566 P16593   [GKS 2016 #E] Beautiful Numbers 0 / 0 5
16892 P16625   [GKS 2017 #D] Sherlock and Matrix Game 0 / 0 9
16922 P16648   [GKS 2018 #D] Paragliding 0 / 0 6
16622 P16677   [CSPro 27] 何以包邮? 0 / 0 3
16697 P16695   [CSPro 29] 垦田计划 0 / 0 5
16946 P16700   [MCO 2026] 队伍选择 0 / 0 6
16954 P16707   [SEATST 2026] 车辆集结 / Car Gathering 0 / 0 7
16869 P16713   相思 0 / 0 3
16972 P16724   [GKS 2019 #A] Parcels 0 / 0 6
16973 P16725   [GKS 2019 #A] Contention 0 / 0 9
17010 P16749   [GKS 2020 #A] Workout 0 / 0 5
17054 P16796   [蓝桥杯 2026 国 B] 灯带修补 0 / 0 5
17066 P16808   [蓝桥杯 2026 国 Python A] 连续丢卡 0 / 0 6
16659 P16827   [AFOI 2025] D.谐音替换 0 / 0 9
17132 P16886   [GKS 2022 #E] Students and Mentors 0 / 0 5
17141 P16895   [GKS 2022 #G] Happy Subarrays 0 / 0 6
17150 P16914   [JLCPC 2026] 隐藏的 k 元组 0 / 0 7
17151 P16915   [JLCPC 2026] 洛克王国世界 0 / 0 7
16999 P16932   魔物 0 / 0 5
17226 P16979   [NWERC 2017] Glyph Recognition 0 / 0 6
17290 P17044   [NWERC 2021] Heating Up 0 / 0 6
17306 P17051   [NWERC 2022] Circular Caramel Cookie 0 / 0 3
17312 P17107   [入门赛 #49] 左右采撷 0 / 0 5
16880 P17116   [Algo Beat 009 & MROI-R1] Avoid K Prefix 0 / 0 6
16606 P17117   [Algo Beat 009 & MROI-R1] Common Ratio 0 / 0 8
17200 P17121   [ICPC 2025 Shanghai R] Menji, we miss you! 0 / 0 7
17205 P17126   [ICPC 2025 Shanghai R] Flower' s land 4 0 / 0 9
17334 P17137   [KOI 2026 #1] 朋友 0 / 0 5
17344 P17141   [NOI 2026] 传送 0 / 0 9
16763 P17181   [ICPC 2017 Hong Kong R] Fermat's Optimization Problem 0 / 0 6
16767 P17185   [ICPC 2017 Hong Kong R] Base Station Sites 0 / 0 3
17114 P17201   「奶龙OI」Round 1 - 廊途行 0 / 0 7
16785 P17222   [ICPC 2017 Nanning R] Twice Equation 0 / 0 6
17160 P17234   [Algo Beat Contest 017 C] 交互题 0 / 0 6
16671 P17283   「IXOI R2」Retribution ~ Cycle of Redemption ~ 0 / 0 6
17194 P17303   [ICPC 2026 Xi'an I] Would You Make a Convex? 0 / 0 5
16810 P17330   [ICPC 2018 Nanjing R] Mediocre String Problem 0 / 0 8
17452 P17390   [PacNW 2025] Training, Round 4 0 / 0 3
16814 P17395   [ICPC 2018 Shenyang R] Diameter of a Tree 0 / 0 (None)
16719 P17437   「LWLV Round 1」Young 0 / 0 7

Categories

Lucky

Pick a problem randomly based on the current filter.