1 Kyu
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Country/Region	China
Birth Year	2009
Codeforces ID	OIer_Cosmos
Affiliation	福建省厦门双十中学

Contest Status

• Algorithm
• Heuristic

Rank	2022nd (Top 1.59%)
Rating	1933
Highest Rating	1961 ― 1 Kyu (+39 to promote)
Rated Matches	30
Last Competed	2025/11/22

Competition History Last Contest Result