Charles Dai
Country:
Timeline
| Contest | 2019 | 2020 | 2021 | 2022 |
|---|---|---|---|---|
| Worldwide High School and Collegiate Onsites: | ||||
| IOI | 239 | 
83
| ||
- — competition hasn't been held that year, or wasn't an international championship, or we have no info about it
F — participated in the final event, but the rank is unknown
Q — qualified to the final event but hasn't participated in it
Q* — qualified to the final event only after some other contestant refused to participate