| #13801 | RiversIOI 2005 Day 2 | |
| #13802 | ArtemisIOI 2004 Day 1 | |
| #13803 | HermesIOI 2004 Day 1 | |
| #13804 | PolygonIOI 2004 Day 1Output Only | |
| #13805 | EmpodiaIOI 2004 Day 2 | |
| #13806 | PhidiasIOI 2004 Day 2 | |
| #13807 | FarmerIOI 2004 Day 2 | |
| #13808 | Trail Maintenance IOI 2003 Day 1Interactive | |
| #13809 | Comparing CodeIOI 2003 Day 1 | |
| #13810 | ReverseIOI 2003 Day 1Output Only | |
| #13811 | Guess Which CowIOI 2003 Day 2Interactive | |
| #13812 | Amazing RobotsIOI 2003 Day 2 | |
| #13813 | Seeing the BoundaryIOI 2003 Day 2 | |
| #13814 | The Troublesome FrogIOI 2002 Day 1 | |
| #13815 | Utopia DividedIOI 2002 Day 1 | |
| #13816 | XORIOI 2002 Day 1Output Only | |
| #13817 | Batch SchedulingIOI 2002 Day 2 | |
| #13818 | Bus TerminalsIOI 2002 Day 2 | |
| #13821 | 棋盘制作ZJOI 2007 Day 1 | |
| #13822 | 报表统计ZJOI 2007 Day 1 | |
| #13823 | 矩阵游戏ZJOI 2007 Day 1 | |
| #13824 | 时态同步ZJOI 2007 Day 1 | |
| #13825 | 最大半连通子图ZJOI 2007 Day 2 | |
| #13826 | 粒子运动ZJOI 2007 Day 2 | |
| #13827 | 捉迷藏ZJOI 2007 Day 2 | |
| #13828 | 仓库建设ZJOI 2007 Day 2 | |
| #13829 | 杀蚂蚁ZJOI 2008 Day 1 | |
| #13830 | 泡泡堂ZJOI 2008 Day 1 | |
| #13831 | RiskZJOI 2008 Day 1 | |
| #13832 | 树的统计ZJOI 2008 Day 1 | |
| #13833 | 生日聚会ZJOI 2008 Day 2 | |
| #13834 | 瞭望塔ZJOI 2008 Day 2 | |
| #13835 | 无序运动ZJOI 2008 Day 2 | |
| #13836 | 骑士ZJOI 2008 Day 2 | |
| #13837 | 数字计数ZJOI 2010 Day 1 | |
| #13838 | 网络扩容ZJOI 2010 Day 1 | |
| #13839 | 基站选址ZJOI 2010 Day 1 | |
| #13840 | 排列计数ZJOI 2010 Day 2 | |
| #13841 | 任务安排ZJOI 2010 Day 2 | |
| #13842 | 贪吃的老鼠ZJOI 2010 Day 2 | |
| #13843 | 小凯的疑惑NOIP 2017 Day 1 | |
| #13844 | 时间复杂度NOIP 2017 Day 1 | |
| #13845 | 逛公园NOIP 2017 Day 1 | |
| #13846 | 奶酪NOIP 2017 Day 2 | |
| #13847 | 宝藏NOIP 2017 Day 2 | |
| #13848 | 列队NOIP 2017 Day 2 | |
| #13849 | 玩具谜题NOIP 2016 Day 1 | |
| #13850 | 天天爱跑步NOIP 2016 Day 1 | |
| #13851 | 换教室NOIP 2016 Day 1 | |
| #13852 | 组合数问题NOIP 2016 Day 2 | |
| #13853 | 蚯蚓NOIP 2016 Day 2 | |
| #13854 | 愤怒的小鸟NOIP 2016 Day 2 | |
| #13876 | The AmuletCodeSprint LA 2025 - Open | |
| #13877 | Arcane SecretCodeSprint LA 2025 - BeginnerCodeSprint LA 2025 - High SchoolCodeSprint LA 2025 - Open | |
| #13878 | Balancing the CouncilCodeSprint LA 2025 - High SchoolCodeSprint LA 2025 - Open | |
| #13879 | Chemtech ContagionCodeSprint LA 2025 - High SchoolCodeSprint LA 2025 - Open | |
| #13880 | Clutch GameCodeSprint LA 2025 - High School | |
| #13881 | Dining DisasterCodeSprint LA 2025 - Beginner | |
| #13882 | EvasionCodeSprint LA 2025 - High SchoolCodeSprint LA 2025 - Open | |
| #13883 | Get Jinxed!CodeSprint LA 2025 - High SchoolCodeSprint LA 2025 - Open | |
| #13884 | Grey AreaCodeSprint LA 2025 - Beginner | |
| #13885 | Hextech OrdnanceCodeSprint LA 2025 - High SchoolCodeSprint LA 2025 - Open | |
| #13886 | If IndexCodeSprint LA 2025 - Beginner | |
| #13887 | Mapping the UndercityCodeSprint LA 2025 - BeginnerCodeSprint LA 2025 - High SchoolCodeSprint LA 2025 - Open | |
| #13888 | Odd RubbleCodeSprint LA 2025 - Beginner | |
| #13889 | OK MapsCodeSprint LA 2025 - BeginnerCodeSprint LA 2025 - High School | |
| #13890 | Olympic CeremonyCodeSprint LA 2025 - High SchoolCodeSprint LA 2025 - OpenInteractive | |
| #13891 | Plotting the PiltCodeSprint LA 2025 - BeginnerCodeSprint LA 2025 - High School | |
| #13892 | Popcorn ButtonCodeSprint LA 2025 - Open | |
| #13893 | Shimmer RobotsCodeSprint LA 2025 - Beginner | |
| #13894 | Team Up!CodeSprint LA 2025 - High SchoolCodeSprint LA 2025 - Open | |
| #13895 | Topside vs ZaunCodeSprint LA 2025 - Open | |