4 Dan
johnchen902 
| Country/Region |  Taiwan |
|---|---|
| Birth Year | 1997 |
| Twitter ID | @johnchen902 |
| TopCoder ID | johnchen902 |
| Codeforces ID | johnchen902 |
| Affiliation | Google Taiwan Engineering Ltd. |
4 Dan
johnchen902 
| Country/Region | Taiwan |
|---|---|
| Birth Year | 1997 |
| Twitter ID | @johnchen902 |
| TopCoder ID | johnchen902 |
| Codeforces ID | johnchen902 |
| Affiliation | Google Taiwan Engineering Ltd. |