9 Kyu
P_K_Koo 
| Country/Region |  China |
|---|---|
| Birth Year | 2002 |
| X(Twitter) ID | @2_UPKo6 |
| TopCoder ID | 477 |
| Codeforces ID | Koo_Pung-Kei |
| Affiliation | 香港上海銀行ホールディングス・HSDC |
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