| #2102 | Gra w kółkoPA 2009 | |
| #2103 | Termity | |
| #2105 | DominoXXIX Olimpiada Informatyczna - I etapPOI 2021 Stage 1 | |
| #2106 | DrukXXIX Olimpiada Informatyczna - I etapPOI 2021 Stage 1 | |
| #2107 | Impreza krasnaliXXIX Olimpiada Informatyczna - I etapPOI 2021 Stage 1 | |
| #2108 | MontażystaXXIX Olimpiada Informatyczna - I etapPOI 2021 Stage 1 | |
| #2109 | Układanie kartXXIX Olimpiada Informatyczna - I etapPOI 2021 Stage 1 | |
| #2110 | k 小割WC 2015 | |
| #2111 | 混淆与破解WC 2015 | |
| #2112 | 未来程序WC 2015Output Only | |
| #2113 | Zbalansowane słowaPA 2021 | |
| #2114 | Koszulki [C]PA 2021 | |
| #2115 | Od deski do deski [A]PA 2021 | |
| #2116 | Oranżada [B]PA 2021 | |
| #2117 | Pandemia [B]PA 2021 | |
| #2118 | Poborcy podatkowi [A]PA 2021 | |
| #2119 | Zakłócenia [C]PA 2021 | |
| #2120 | Mopadulo [B]PA 2021 | |
| #2121 | Sumy [C]PA 2021 | |
| #2122 | Wystawa [A]PA 2021 | |
| #2123 | Areny [A]PA 2021 | |
| #2124 | Ranking sklepów internetowych [C]PA 2021 | |
| #2125 | Skrzyżowania [B]PA 2021 | |
| #2126 | Autostrada [B]PA 2021 | |
| #2127 | Butelki [C]PA 2021 | |
| #2128 | Drzewo czerwono-czarne [C]PA 2021 | |
| #2129 | Desant 2 [B]PA 2021 | |
| #2130 | Fiolki 2 [A]PA 2021 | |
| #2131 | Zbiory niezależne [A]PA 2021 | |
| #2133 | Natives | |
| #2134 | Balanced Illumination | |
| #2135 | How Many Strings Are Less | |
| #2136 | Exam registration | |
| #2137 | Fair Robbery | |
| #2138 | Counting Antibodies | |
| #2139 | The Math of Sailing | |
| #2140 | Lots of Parabolas | |
| #2141 | Wheel of Fortune | |
| #2142 | Yurik and Woodwork Lesson | |
| #2143 | Railroad sorting | |
| #2144 | Birthday | |
| #2151 | TicketsUSACO 2021 December Platinum | |
| #2152 | Paired UpUSACO 2021 December Platinum | |
| #2153 | HILOUSACO 2021 December Platinum | |
| #2160 | CardiologyWorld Finals 2020 | |
| #2161 | The Cost of Speed LimitsWorld Finals 2020 | |
| #2162 | DomesWorld Finals 2020 | |
| #2163 | Gene FoldingWorld Finals 2020 | |
| #2164 | Landscape GeneratorWorld Finals 2020 | |
| #2165 | Ley LinesWorld Finals 2020 | |
| #2166 | Opportunity CostWorld Finals 2020 | |
| #2167 | QC QCWorld Finals 2020Interactive | |
| #2168 | QuestsWorld Finals 2020 | |
| #2169 | 'S No ProblemWorld Finals 2020 | |
| #2170 | Space WallsWorld Finals 2020 | |
| #2171 | Sweep StakesWorld Finals 2020 | |
| #2172 | Trailing DigitsWorld Finals 2020 | |
| #2173 | What's Our Vector, Victor?World Finals 2020 | |
| #2174 | Which Planet is This?!World Finals 2020 | |
| #2175 | Growing Vegetables is Fun 4JOI 2020/2021 | |
| #2176 | SnowballJOI 2020/2021 | |
| #2177 | Group PhotoJOI 2020/2021 | |
| #2178 | RobotJOI 2020/2021 | |
| #2179 | Dungeon 3JOI 2020/2021 | |
| #2191 | Apprentice Learning TrajectoryNorthern Eurasia Finals 2019NERC 2019 | |
| #2192 | Balls of BumaNorthern Eurasia Finals 2019NERC 2019 | |
| #2193 | Cactus RevengeNorthern Eurasia Finals 2019NERC 2019 | |
| #2194 | DevOps Best PracticesNorthern Eurasia Finals 2019NERC 2019 | |
| #2195 | ElectionsNorthern Eurasia Finals 2019NERC 2019 | |
| #2196 | Foolprüf SecurityNorthern Eurasia Finals 2019NERC 2019 | |
| #2197 | Game RelicsNorthern Eurasia Finals 2019NERC 2019 | |
| #2198 | Help BerLineNorthern Eurasia Finals 2019NERC 2019 | |
| #2199 | Intriguing SelectionNorthern Eurasia Finals 2019NERC 2019Interactive | |
| #2200 | Just Arrange the IconsNorthern Eurasia Finals 2019NERC 2019 | |