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Category: Japan - JOI Open Contest (日本情報オリンピック 通信教育)
| Category | #(Cont.) | #(Prob.) | |
|---|---|---|---|
| JOI Open Contest 2013 | A B C | 3 | |
| JOI Open Contest 2014 Day 1 | A B C | 3 | |
| JOI Open Contest 2014 Day 2 | A B C | 3 | |
| JOI Open Contest 2015 | A B C | 3 | |
| JOI Open Contest 2016 | A B C | 3 | |
| JOI Open Contest 2017 | A B C | 3 | |
| JOI Open Contest 2018 | A B C D | 4 | |
| JOI Open Contest 2019 | A B C | 3 | |
| JOI Open Contest 2020 | A B C | 3 | |
| JOI Open Contest 2021 | A B C | 3 | |
| JOI Open Contest 2022 | A B C | 3 | |
| JOI Open Contest 2023 | A B C | 3 | |
| JOI Open Contest 2024 | A B C | 3 | |
| JOI Open Contest 2025 | A B C | 3 |