《BalticOI》历年试题
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BalticOI Contest Problems (2000-2025)
- loj4923 [BalticOI 2025] BOI 缩写
- loj4924 [BalticOI 2025] 旅游
- loj4925 [BalticOI 2025] 塔楼
- loj4926 [BalticOI 2025] 开发
- loj4927 [BalticOI 2025] 指数
- loj4928 [BalticOI 2025] 姜饼
- loj4192 [BalticOI 2024] Jobs
- loj4193 [BalticOI 2024] Portal
- loj4194 [BalticOI 2024] Trains
- loj4195 [BalticOI 2024] Fire
- loj4196 [BalticOI 2024] Tiles
- loj4197 [BalticOI 2024] Flooding Wall
- loj4186 [BalticOI 2023] Astronomer
- loj4187 [BalticOI 2023] Staring Contest
- loj4188 [BalticOI 2023] Tycho
- loj4189 [BalticOI 2023] Minequake
- loj4190 [BalticOI 2023] Mineral deposits
- loj4191 [BalticOI 2023] Sequence
- loj3774 [BalticOI 2022 Day1] Art Collections
- loj3775 [BalticOI 2022 Day1] Event Hopping
- loj3776 [BalticOI 2022 Day1] Uplifting Excursion
- loj3778 [BalticOI 2022 Day2] Stranded Far From Home
- loj3779 [BalticOI 2022 Day2] Boarding Passes
- loj3557 [BalticOI 2021 Day0] Keyboard
- loj3558 [BalticOI 2021 Day1] A Difficult Choice
- loj3559 [BalticOI 2021 Day1] Inside information
- loj3560 [BalticOI 2021 Day1] From Hacks to Snitches
- loj3561 [BalticOI 2021 Day2] The short shank; Redemption
- loj3562 [BalticOI 2021 Day2] The Collection Game
- loj3563 [BalticOI 2021 Day2] The Xana coup
- loj3332 [BalticOI 2020] 色彩
- loj3333 [BalticOI 2020] 混合物
- loj3334 [BalticOI 2020] 小丑
- loj3335 [BalticOI 2020] 图
- loj3336 [BalticOI 2020] 村庄
- loj3337 [BalticOI 2020] 病毒
- loj3338 [BalticOI 2020] 玫瑰花
- loj3202 [BalticOI 2019 Day1] 潜艇
- loj3203 [BalticOI 2019 Day1] 山谷
- loj3204 [BalticOI 2019 Day2] 汤姆的餐厅
- loj3205 [BalticOI 2019 Day2] 项链
- loj3207 [BalticOI 2019 Day2] 奥运会
- loj2774 [BalticOI 2018] 多角恋
- loj2775 [BalticOI 2018] 火星人的 DNA
- loj2776 [BalticOI 2018] 蠕虫之忧
- loj2777 [BalticOI 2018] 交流电
- loj2778 [BalticOI 2018] 基因工程
- loj2779 [BalticOI 2018] 路径
- loj3354 [BalticOI 2017 Day1] Political Development
- loj3355 [BalticOI 2017 Day1] Railway
- loj3356 [BalticOI 2017 Day1] Toll
- loj3357 [BalticOI 2017 Day2] Cat in a tree
- loj3358 [BalticOI 2017 Day2] Friends
- loj3359 [BalticOI 2017 Day2] Plus Minus
- loj2780 [BalticOI 2016 Day1] 上司们
- loj2781 [BalticOI 2016 Day1] 公园
- loj2782 [BalticOI 2016 Day1] 螺旋
- loj2783 [BalticOI 2016 Day2] 城市
- loj2784 [BalticOI 2016 Day2] 迷宫
- loj2785 [BalticOI 2016 Day2] 交换
- loj2371 [BalticOI 2015] 网络
- loj2705 [BalticOI 2015] 保龄球
- loj2706 [BalticOI 2015] 文本编辑器
- loj2707 [BalticOI 2015] 拔河
- loj2708 [BalticOI 2015] 文件路径
- loj2709 [BalticOI 2015] 黑客
- loj2822 [BalticOI 2014 Day1] 警察与强盗
- loj2823 [BalticOI 2014 Day 1] 三个朋友
- loj2824 [BalticOI 2014 Day 1] 序列
- loj2825 [BalticOI 2014 Day2] 界限划定
- loj2826 [BalticOI 2014 Day2] 传送门
- loj2827 [BalticOI 2014 Day2] 老年邮递员
- loj2682 [BalticOI 2013] Ball Machine
- loj2683 [BalticOI 2013] 非回文数 Palindrome-Free Numbers
- loj2684 [BalticOI 2013] 管道 Pipes
- loj2685 [BalticOI 2013] Brunhilda 的生日 Brunhilda's Birthday
- loj2686 [BalticOI 2013] 雪地足迹 Tracks in the Snow
- loj2687 [BalticOI 2013] Vim
- loj3292 [BalticOI 2012 Day1] 括号
- loj3293 [BalticOI 2012 Day1] 移动网络
- loj3294 [BalticOI 2012 Day1] 山峰
- loj3295 [BalticOI 2012 Day2] 城市烟花
- loj3296 [BalticOI 2012 Day2] 旋律
- loj3297 [BalticOI 2012 Day2] 俄罗斯方块
- loj2630 [BalticOI 2011 Day1] 种树 Growing Trees
- loj2632 [BalticOI 2011 Day1] 打开灯泡 Switch the Lamp On
- loj2633 [BalticOI 2011 Day1] 宝藏与维京海盗 Treasures and Vikings
- loj2634 [BalticOI 2011 Day2] 会议 Meetings
- loj2635 [BalticOI 2011 Day2] 剽窃 Plagiarism
- loj2636 [BalticOI 2011 Day2] 多边形 Polygon
- loj2637 [BalticOI 2011 Day2] 树的镜像 Tree Mirroring
- loj2676 [BalticOI 2010] BEARs
- loj2677 [BalticOI 2010] 乐高 Lego
- loj2678 [BalticOI 2010] PCB * Printed Circuit Board
- loj2679 [BalticOI 2010] 箱子 bins
- loj2680 [BalticOI 2010] 糖果 candies
- loj2681 [BalticOI 2010] Mines
- loj2857 [BalticOI 2009 Day1] 甲虫
- loj2858 [BalticOI 2009 Day1] 糖果机器
- loj2859 [BalticOI 2009 Day1] 地铁信号故障
- loj2860 [BalticOI 2009 Day2] 矩形
- loj2861 [BalticOI 2009 Day2] 三角形划分
- loj2862 [BalticOI 2009 Day2] 纪念碑
- loj2364 [BalticOI 2008] 游戏
- loj2365 [BalticOI 2008] 阀门
- loj2366 [BalticOI 2008] 手套
- loj2367 [BalticOI 2008] 网格
- loj2368 [BalticOI 2008] 黑手党
- loj2369 [BalticOI 2008] 魔法石
- loj2370 [BalticOI 2008] 选举
- P3340 [BalticOI 2007] Escape
- P3341 [BalticOI 2007] Ranklist Sorting (Day 1)
- P3342 [BalticOI 2007] Sound 静音问题
- P3343 [BalticOI 2007] Building a Fence (Day 2) 修建围栏
- P3344 [BalticOI 2007] Connected Points (Day 2)
- P3345 [BalticOI 2007] Sequence 序列问题
- P3346 [BalticOI 2006] coin collector 钱币收藏家
- P3347 [BalticOI 2006] BITWISE EXPRESSIONS (Day 1)
- P3348 [BalticOI 2006] CITY PLANNING (Day 2)
- P3350 [BalticOI 2006] JUMP THE BOARD! (Day 2)
- P3351 [BalticOI 2006] COUNTRIES (Day 1)
- P3352 [BalticOI 2006] RLE COMPRESSION (Day 2)
- P3353 [BalticOI 2005] Maze
- P3354 [BalticOI 2005] Bus Trip
- P3362 [BalticOI 2005] Card 卡牌游戏 (Day0)
- P3363 [BalticOI 2005] Polygon
- P3394 [BalticOI 2005] Ancient Manuscript (Day2)
- P3395 [BalticOI 2005] Bus Trip (Day2)
- P3364 [BalticOI 2004] ships 船
- P3365 [BalticOI 2004] SCALES (Day 1)
- P3366 [BalticOI 2004] REPEATS
- P3367 [BalticOI 2004] 数字序列 (spj)
- P3368 [BalticOI 2004] CAR PARK
- P3256 [BalticOI 2004] RECTANGLES
- P3369 [BalticOI 2003] Gem 气垫车
- P3370 [BalticOI 2003] 团伙
- P3371 [BalticOI 2003] Barrel
- P3372 [BalticOI 2003] Lamps (Day 2)
- P3373 [BalticOI 2003] Table (Day 1)
- P3374 [BalticOI 2003] Register Allocation (Day 2)
- P3375 [BalticOI 2002] 双调路径
- P3376 [BalticOI 2002] Speed Limits (Day1)
- P3377 [BalticOI 2002] L Game © Edward de Bono (Day2)
- P3378 [BalticOI 2002] Triangles (Day1)
- P3387 [BalticOI 2002] Moving Robots (Day2)
- P3379 [Baltic2001] Postman
- P3380 [BalticOI 2001] Box of Mirrors
- P3381 [Baltic2001] Knights
- P3382 [Baltic2001] Mars Maps
- P3383 [Baltic2001] Teleports
- P3393 [Baltic2001] Knights
章节 1. 《BalticOI》历年试题
开放
| 题目 | 尝试 | AC | 难度 |
|---|---|---|---|
| loj4923 「BalticOI 2025」BOI 缩写 | 1 | 1 | 10 |
| loj4924 「BalticOI 2025」旅游 | 1 | 1 | 10 |
| loj4925 「BalticOI 2025」塔楼 | 1 | 1 | 10 |
| loj4926 「BalticOI 2025」开发 | 1 | 1 | 10 |
| loj4927 「BalticOI 2025」指数 | 1 | 1 | 10 |
| loj4928 「BalticOI 2025」姜饼 | 1 | 1 | 10 |
| loj4192 「BalticOI 2024」Jobs | 2 | 1 | 10 |
| loj4193 「BalticOI 2024」Portal | 2 | 1 | 10 |
| loj4194 「BalticOI 2024」Trains | 1 | 1 | 10 |
| loj4195 「BalticOI 2024」Fire | 2 | 1 | 10 |
| loj4196 「BalticOI 2024」Tiles | 6 | 2 | 10 |
| loj4197 「BalticOI 2024」Flooding Wall | 1 | 1 | 10 |
| loj4186 「BalticOI 2023」Astronomer | 1 | 1 | 10 |
| loj4187 「BalticOI 2023」Staring Contest | 1 | 1 | 10 |
| loj4188 「BalticOI 2023」Tycho | 1 | 1 | 10 |
| loj4189 「BalticOI 2023」Minequake | 1 | 1 | 10 |
| loj4190 「BalticOI 2023」Mineral deposits | 1 | 1 | 10 |
| loj4191 「BalticOI 2023」Sequence | 1 | 1 | 10 |
| loj3774 「BalticOI 2022 Day1」Art Collections | 3 | 1 | 10 |
| loj3775 「BalticOI 2022 Day1」Event Hopping | 5 | 1 | 10 |
| loj3776 「BalticOI 2022 Day1」Uplifting Excursion | 1 | 1 | 10 |
| loj3778 「BalticOI 2022 Day2」Stranded Far From Home | 2 | 1 | 10 |
| loj3779 「BalticOI 2022 Day2」Boarding Passes | 2 | 1 | 10 |
| loj3557 「BalticOI 2021 Day0」Keyboard | 1 | 1 | 10 |
| loj3558 「BalticOI 2021 Day1」A Difficult Choice | 1 | 1 | 10 |
| loj3559 「BalticOI 2021 Day1」Inside information | 1 | 1 | 10 |
| loj3560 「BalticOI 2021 Day1」From Hacks to Snitches | 1 | 1 | 10 |
| loj3561 「BalticOI 2021 Day2」The short shank; Redemption | 1 | 1 | 10 |
| loj3562 「BalticOI 2021 Day2」The Collection Game | 1 | 1 | 10 |
| loj3563 「BalticOI 2021 Day2」The Xana coup | 1 | 1 | 10 |
| loj3332 「BalticOI 2020」色彩 | 1 | 1 | 10 |
| loj3333 「BalticOI 2020」混合物 | 1 | 1 | 10 |
| loj3334 「BalticOI 2020」小丑 | 1 | 1 | 10 |
| loj3335 「BalticOI 2020」图 | 1 | 1 | 10 |
| loj3336 「BalticOI 2020」村庄 | 1 | 1 | 10 |
| loj3337 「BalticOI 2020」病毒 | 1 | 1 | 10 |
| loj3338 「BalticOI 2020」玫瑰花 | 1 | 1 | 10 |
| loj3202 「BalticOI 2019 Day1」潜艇 | 1 | 1 | 10 |
| loj3203 「BalticOI 2019 Day1」山谷 | 1 | 1 | 10 |
| loj3204 「BalticOI 2019 Day2」汤姆的餐厅 | 1 | 1 | 10 |
| loj3205 「BalticOI 2019 Day2」项链 | 3 | 1 | 10 |
| loj3207 「BalticOI 2019 Day2」奥运会 | 1 | 1 | 10 |
| loj2774 「BalticOI 2018」多角恋 | 1 | 1 | 10 |
| loj2775 「BalticOI 2018」火星人的 DNA | 1 | 1 | 10 |
| loj2776 「BalticOI 2018」蠕虫之忧 | 1 | 1 | 10 |
| loj2777 「BalticOI 2018」交流电 | 1 | 1 | 10 |
| loj2778 「BalticOI 2018」基因工程 | 1 | 1 | 10 |
| loj2779 「BalticOI 2018」路径 | 1 | 1 | 10 |
| loj3354 「BalticOI 2017 Day1」Political Development | 1 | 1 | 10 |
| loj3355 「BalticOI 2017 Day1」Railway | 1 | 1 | 10 |
| loj3356 「BalticOI 2017 Day1」Toll | 1 | 1 | 10 |
| loj3357 「BalticOI 2017 Day2」Cat in a tree | 1 | 1 | 10 |
| loj3358 「BalticOI 2017 Day2」Friends | 1 | 1 | 10 |
| loj3359 「BalticOI 2017 Day2」Plus Minus | 1 | 1 | 10 |
| loj2780 「BalticOI 2016 Day1」上司们 | 8 | 4 | 10 |
| loj2781 「BalticOI 2016 Day1」公园 | 3 | 1 | 10 |
| loj2782 「BalticOI 2016 Day1」螺旋 | 2 | 1 | 10 |
| loj2783 「BalticOI 2016 Day2」城市 | 2 | 2 | 10 |
| loj2784 「BalticOI 2016 Day2」迷宫 | 2 | 0 | 10 |
| loj2785 「BalticOI 2016 Day2」交换 | 1 | 1 | 10 |
| loj2371 「BalticOI 2015」网络 | 2 | 1 | 10 |
| loj2705 「BalticOI 2015」保龄球 | 1 | 1 | 10 |
| loj2706 「BalticOI 2015」文本编辑器 | 2 | 1 | 10 |
| loj2707 「BalticOI 2015」拔河 | 1 | 1 | 10 |
| loj2708 「BalticOI 2015」文件路径 | 1 | 1 | 10 |
| loj2709 「BalticOI 2015」黑客 | 2 | 2 | 10 |
| loj2822 「BalticOI 2014 Day1」警察与强盗 | 2 | 1 | 10 |
| loj2823 「BalticOI 2014 Day 1」三个朋友 | 116 | 21 | 8 |
| loj2824 「BalticOI 2014 Day 1」序列 | 1 | 1 | 10 |
| loj2825 「BalticOI 2014 Day2」界限划定 | 1 | 1 | 10 |
| loj2826 「BalticOI 2014 Day2」传送门 | 1 | 1 | 10 |
| loj2827 「BalticOI 2014 Day2」老年邮递员 | 1 | 1 | 10 |
| loj2682 「BalticOI 2013」Ball Machine | 1 | 1 | 10 |
| loj2683 「BalticOI 2013」非回文数 Palindrome-Free Numbers | 1 | 1 | 10 |
| loj2684 「BalticOI 2013」管道 Pipes | 2 | 1 | 10 |
| loj2685 「BalticOI 2013」Brunhilda 的生日 Brunhilda’s Birthday | 1 | 1 | 10 |
| loj2686 「BalticOI 2013」雪地足迹 Tracks in the Snow | 5 | 1 | 10 |
| loj2687 「BalticOI 2013」Vim | 1 | 1 | 10 |
| loj3292 「BalticOI 2012 Day1」括号 | 1 | 1 | 10 |
| loj3293 「BalticOI 2012 Day1」移动网络 | 1 | 1 | 10 |
| loj3294 「BalticOI 2012 Day1」山峰 | 1 | 1 | 10 |
| loj3295 「BalticOI 2012 Day2」城市烟花 | 1 | 1 | 10 |
| loj3296 「BalticOI 2012 Day2」旋律 | 1 | 1 | 10 |
| loj3297 「BalticOI 2012 Day2」俄罗斯方块 | 2 | 0 | 10 |
| loj2630 「BalticOI 2011 Day1」种树 Growing Trees | 2 | 1 | 10 |
| lg4667 B17 双端队列BFS [BalticOI 2011] Switch the Lamp On (Day1) | 107 | 31 | 6 |
| loj2633 「BalticOI 2011 Day1」宝藏与维京海盗 Treasures and Vikings | 1 | 1 | 10 |
| loj2634 「BalticOI 2011 Day2」会议 Meetings | 1 | 1 | 10 |
| loj2635 「BalticOI 2011 Day2」剽窃 Plagiarism | 1 | 1 | 10 |
| loj2636 「BalticOI 2011 Day2」多边形 Polygon | 1 | 1 | 10 |
| loj2637 「BalticOI 2011 Day2」树的镜像 Tree Mirroring | 1 | 1 | 10 |
| loj2676 「BalticOI 2010」BEARs | 1 | 1 | 10 |
| loj2677 「BalticOI 2010」乐高 Lego | 1 | 1 | 10 |
| loj2678 「BalticOI 2010」PCB * Printed Circuit Board | 1 | 1 | 10 |
| loj2679 「BalticOI 2010」箱子 bins | 1 | 1 | 10 |
| loj2680 「BalticOI 2010」糖果 candies | 1 | 1 | 10 |
| loj2681 「BalticOI 2010」Mines | 1 | 0 | 10 |
| loj2857 「BalticOI 2009 Day1」甲虫 | 1 | 1 | 10 |
| loj2858 「BalticOI 2009 Day1」糖果机器 | 1 | 1 | 10 |
| loj2859 「BalticOI 2009 Day1」地铁信号故障 | 0 | 0 | (无) |
| loj2860 「BalticOI 2009 Day2」矩形 | 1 | 1 | 10 |
| loj2861 「BalticOI 2009 Day2」三角形划分 | 1 | 1 | 10 |
| loj2862 「BalticOI 2009 Day2」纪念碑 | 1 | 1 | 10 |
| loj2364 「BalticOI 2008」游戏 | 8 | 4 | 10 |
| loj2365 「BalticOI 2008」阀门 | 10 | 6 | 9 |
| loj2366 「BalticOI 2008」手套 | 7 | 3 | 10 |
| loj2367 「BalticOI 2008」网格 | 11 | 5 | 9 |
| loj2368 「BalticOI 2008」黑手党 | 13 | 5 | 9 |
| loj2369 「BalticOI 2008」魔法石 | 3 | 3 | 10 |
| loj2370 「BalticOI 2008」选举 | 9 | 4 | 9 |
| P3340 [BalticOI 2007] Escape | 2 | 0 | 10 |
| P3341 [BalticOI 2007] Ranklist Sorting (Day 1) | 1 | 0 | 10 |
| P3342 [BalticOI 2007] Sound 静音问题 | 26 | 0 | 10 |
| P3343 [BalticOI 2007] Building a Fence (Day 2) 修建围栏 | 15 | 0 | 10 |
| P3344 [BalticOI 2007] Connected Points (Day 2) | 93 | 0 | 10 |
| P3345 [BalticOI 2007] Sequence 序列问题 | 104 | 0 | 10 |
| P3346 [BalticOI 2006] coin collector钱币收藏家 | 1 | 0 | 10 |
| P3347 [BalticOI 2006] BITWISE EXPRESSIONS (Day 1) | 11 | 0 | 10 |
| P3348 [BalticOI 2006] CITY PLANNING (Day 2) | 6 | 0 | 10 |
| P3350 [BalticOI 2006] JUMP THE BOARD! (Day 2) | 8 | 0 | 10 |
| P3351 [BalticOI 2006] COUNTRIES (Day 1)(无数据) | 30 | 0 | 10 |
| P3352 [BalticOI 2006] RLE COMPRESSION (Day 2) | 26 | 0 | 10 |
| P3353 [BalticOI 2005] Maze | 63 | 0 | 10 |
| P3354 [BalticOI 2005] Bus Trip(无数据) | 60 | 0 | 10 |
| P3362 [BalticOI 2005] Card 卡牌游戏 (Day0) | 25 | 0 | 10 |
| P3363 [BalticOI 2005] Polygon(无 spj) | 11 | 0 | 10 |
| P3394 [BalticOI 2005] Ancient Manuscript (Day2) | 32 | 0 | 10 |
| P3395 [BalticOI 2005] Bus Trip (Day2) | 19 | 0 | 10 |
| P3364 [BalticOI 2004] ships 船 | 12 | 0 | 10 |
| P3365 [BalticOI 2004] SCALES (Day 1) | 23 | 0 | 10 |
| P3366 [BalticOI 2004] REPEATS（无spj） | 0 | 0 | (无) |
| lg4331 C18 左偏树 [BalticOI 2004] Sequence (Day1) | 4 | 1 | 10 |
| P3368 [BalticOI 2004] CAR PARK | 38 | 0 | 10 |
| P3256 [BalticOI 2004] RECTANGLES（无spj） | 22 | 0 | 10 |
| P3369 [BalticOI 2003] Gem 气垫车 | 30 | 0 | 10 |
| lg1892 C123【扩展域并查集】[BalticOI 2003] 团伙 | 63 | 15 | 7 |
| P3371 [BalticOI 2003] Barrel(数据有问题) | 6 | 0 | 10 |
| P3372 [BalticOI 2003] Lamps (Day 2) | 16 | 0 | 10 |
| P3373 [BalticOI 2003] Table (Day 1) | 31 | 0 | 10 |
| P3374 [BalticOI 2003] Register Allocation (Day 2) | 46 | 0 | 10 |
| P3375 [BalticOI 2002] 双调路径 | 10 | 0 | 10 |
| P3376 D107 分层图最短路 Dijkstra 算法[BalticOI 2002] Speed Limits (Day1) | 1 | 1 | 10 |
| P3377 [BalticOI 2002] L Game © Edward de Bono (Day2) | 17 | 0 | 10 |
| P3378 [BalticOI 2002] Triangles (Day1) | 9 | 0 | 10 |
| P3387 [BalticOI 2002] Moving Robots (Day2) | 15 | 0 | 10 |
| P3379 [Baltic2001] Postman | 5 | 0 | 10 |
| P3380 [BalticOI 2001] Box of Mirrors | 17 | 0 | 10 |
| P3381 [Baltic2001]Knights | 37 | 0 | 10 |
| P3382 [Baltic2001]Mars Maps | 15 | 0 | 10 |
| P3383 [Baltic2001]Teleports | 53 | 0 | 10 |
| P3393 1393[Baltic2001]Knights | 31 | 0 | 10 |
| P3384 [BalticOI 2000] Time Zones | 19 | 0 | 10 |
| P3385 [BalticOI 2000] Division expression | 8 | 0 | 10 |
| P3386 [BalticOI 2000] Stickers | 2 | 1 | 10 |