| Iden | Name | Platform | Difficulty | Limits |
|---|---|---|---|---|
| jsc2021_h | Shipping | AtCoder | — | 5000ms / 256MB |
| keyence2019_a | Beginning | AtCoder | — | 2000ms / 256MB |
| keyence2019_b | KEYENCE String | AtCoder | — | 2000ms / 256MB |
| keyence2019_c | Exam and Wizard | AtCoder | — | 2000ms / 256MB |
| keyence2019_d | Double Landscape | AtCoder | — | 2000ms / 256MB |
| keyence2019_e | Connecting Cities | AtCoder | — | 2000ms / 256MB |
| keyence2019_f | Paper Cutting | AtCoder | — | 2000ms / 256MB |
| keyence2020_a | Painting | AtCoder | — | 2000ms / 256MB |
| keyence2020_b | Robot Arms | AtCoder | — | 2000ms / 256MB |
| keyence2020_c | Subarray Sum | AtCoder | — | 2000ms / 256MB |
| keyence2020_d | Swap and Flip | AtCoder | — | 2000ms / 256MB |
| keyence2020_e | Bichromization | AtCoder | — | 2000ms / 256MB |
| keyence2020_f | Monochromization | AtCoder | — | 2000ms / 256MB |
| keyence2021_a | Two Sequences 2 | AtCoder | — | 2000ms / 256MB |
| keyence2021_b | Mex Boxes | AtCoder | — | 2000ms / 256MB |
| keyence2021_c | Robot on Grid | AtCoder | — | 3000ms / 256MB |
| keyence2021_d | Choosing Up Sides | AtCoder | — | 2000ms / 256MB |
| keyence2021_e | Greedy Ant | AtCoder | — | 3000ms / 256MB |
| keyence2021_f | Keyence Repetition | AtCoder | — | 6000ms / 256MB |
| kupc2016_a | A Barricade | AtCoder | — | 1000ms / 256MB |
| kupc2016_b | Problem Committee | AtCoder | — | 1000ms / 256MB |
| kupc2016_c | Cookie Breeding Machine | AtCoder | — | 1000ms / 256MB |
| kupc2016_d | Long Blackboard | AtCoder | — | 1000ms / 256MB |
| kupc2016_e | Fences | AtCoder | — | 2000ms / 256MB |
| kupc2016_f | Speed Solving | AtCoder | — | 1000ms / 256MB |
| kupc2016_g | Exam | AtCoder | — | 2000ms / 256MB |
| kupc2016_h | WAAAAAAAAAAAAALL | AtCoder | — | 2000ms / 256MB |
| kupc2016_i | Handing out leaflets | AtCoder | — | 1000ms / 256MB |
| kupc2016_j | Coloring | AtCoder | — | 4000ms / 256MB |
| kupc2016_k | Hundred Eyes Monster | AtCoder | — | 1000ms / 256MB |
| m_solutions2019_a | Sum of Interior Angles | AtCoder | — | 2000ms / 256MB |
| m_solutions2019_b | Sumo | AtCoder | — | 2000ms / 256MB |
| m_solutions2019_c | Best-of-(2n-1) | AtCoder | — | 2000ms / 256MB |
| m_solutions2019_d | Maximum Sum of Minimum | AtCoder | — | 2000ms / 256MB |
| m_solutions2019_e | Product of Arithmetic Progression | AtCoder | — | 2000ms / 256MB |
| m_solutions2019_f | Random Tournament | AtCoder | — | 2500ms / 256MB |
| m_solutions2020_a | Kyu in AtCoder | AtCoder | — | 2000ms / 256MB |
| m_solutions2020_b | Magic 2 | AtCoder | — | 2000ms / 256MB |
| m_solutions2020_c | Marks | AtCoder | — | 2000ms / 256MB |
| m_solutions2020_d | Road to Millionaire | AtCoder | — | 2000ms / 256MB |
| m_solutions2020_e | M's Solution | AtCoder | — | 3000ms / 256MB |
| m_solutions2020_f | Air Safety | AtCoder | — | 3000ms / 256MB |
| masters2025_qual_a | Ore Rolling (A) | AtCoder | — | 2000ms / 256MB |
| masters2025_qual_b | Ore Rolling (B) | AtCoder | — | 2000ms / 256MB |
| masters2025_qual_c | Ore Rolling (C) | AtCoder | — | 2000ms / 256MB |
| masters_qual_a | Smoothing by Swaps | AtCoder | — | 2000ms / 256MB |
| mujin_pc_2017_a | Robot Racing | AtCoder | — | 2000ms / 256MB |
| mujin_pc_2017_b | Row to Column | AtCoder | — | 2000ms / 256MB |
| mujin_pc_2017_c | Robot and String | AtCoder | — | 2000ms / 256MB |
| mujin_pc_2017_d | Oriented Tree | AtCoder | — | 2000ms / 256MB |