AtCoder Beginner Contest 287 AtCoder Beginner Contest 266 AtCoder Beginner Contest 259 AtCoder Beginner Contest 253 AtCoder Beginner Contest 244 AtCoder Beginner Contest 237 AtCoder Beginner Contest 216 AtCoder Beginner Contest 214

AtCoder Regular Contest 153 AtCoder Regular Contest 061 AtCoder Regular Contest 060 AtCoder Regular Contest 059 AtCoder Regular Contest 124

AtCoder Grand Contest 001

2022-2023 ICPC Asia Nanjing Regional 2022-2023 ICPC Southern and Volga Russian Regional 2017-2018 ICPC Asia Tsukuba Regional 2022-2023 ICPC North Western Russia Regional 2020-2021 ICPC Asia Yinchuan Regional 2018-2019 ICPC Asia Nanjing Regional 2019-2020 ICPC Asia Hong Kong Regional 2019 ICPC World Finals 2019-2020 ICPC Latin American Regional 2021-2022 ICPC Asia Shenyang Regional

2022 CCPC Guangzhou Site 2022 CCPC Weihai Site 2018 CCPC Finals

Codeforces Round #848 (Div. 2) Codeforces Round #844 (Div. 1 + Div. 2) Codeforces Round #383 (Div. 1) Codeforces Round #787 (Div. 3) Codeforces Round #777 (Div. 2) Codeforces Round #738 (Div. 2) Codeforces Round #723 (Div. 2)

Educational Codeforces Round 142 (Rated for Div. 2)