Current or upcoming contests
| Name | Start time | Duration | Difficulty |
|---|
| Name | Start time | Duration | Difficulty |
|---|
| The 2015 ACM-ICPC Asia Changchun Regional Contest | - | 5 hours | 0 |
| The 2015 ACM-ICPC Asia Shenyang Regional Contest | - | 5 hours | 0 |
Ended contests
| Name | Start time | Duration | Difficulty |
|---|
| Public Easy Round #4 | Not set | 5 hours | ? |
| Public Round #15 | Not set | 4 hours 30 minutes | ★★★★☆ |
| Public Round #14 | 2025-01-12 08:30:00 | 5 hours | ★★★★☆ |
| Public CT* Round #2 Day 1 | Not set | 5 hours | ★★★★★☆ |
| Public NOIP Round #8 (Div. 1, 提高) | Not set | 4 hours 30 minutes | ★★★ |
| Public NOIP Round #7 (Div. 1, 提高) | Not set | 4 hours | ★★★ |
| Public Round #13 | 2024-06-30 08:30:00 | 5 hours | ★★★★ |
| Public Round #12 | 2024-02-25 08:30:00 | 4 hours 30 minutes | ★★★★ |
| Public NOIP Round #6 (Div. 1, 提高) | 2023-10-15 08:30:00 | 4 hours | ★★★ |
| Public NOIP Round #6 (Div. 2, 普及) | 2023-10-15 08:30:00 | 3 hours 30 minutes | ★★ |
| Public Round #11 | 2023-07-19 08:00:00 | 5 hours | ★★★★ |
| Public Round #10 | 2023-07-18 08:00:00 | 5 hours 20 minutes | ★★★★ |
| Public Round #9 | 2023-05-14 08:00:00 | 5 hours | ★★★★ |
| Public Round #8 | 2023-03-19 08:00:00 | 5 hours | ★★★★ |
| Public NOIP Round #5 (Div. 1, 提高) | 2023-02-25 08:30:00 | 4 hours 30 minutes | ★★★ |
| Public CTS Round 1 Day 2 | 2023-01-08 08:30:00 | 5 hours | ★★★★★★ |
| Public CTS Round 1 Day 1 | 2023-01-07 08:30:00 | 5 hours | ★★★★★★ |
| Public NOIP Round #4 (Div. 1, 提高) | 2022-11-20 08:30:00 | 4 hours 30 minutes | ★★★ |
| Public NOIP Round #4 (Div. 2, 普及) | 2022-11-20 08:30:00 | 3 hours 30 minutes | ? |
| Public NOIP Round #3 (Div. 1, 提高) | 2022-10-22 08:30:00 | 4 hours 30 minutes | ★★★ |
| Public NOIP Round #3 (Div. 2, 普及) | 2022-10-22 08:30:00 | 3 hours 30 minutes | ★★ |
| Public NOIP Round #2 (Div. 1, 提高) | 2022-10-04 08:30:00 | 4 hours 30 minutes | ★★★ |
| Public NOIP Round #2 (Div. 2, 普及) | 2022-10-04 08:30:00 | 3 hours 30 minutes | ★★ |
| Public Easy Round #3 | 2022-09-25 08:00:00 | 5 hours | ★★★ |
| Public NOIP Round #1 (Div. 1, 提高) | 2022-09-10 14:00:00 | 4 hours | ★★★ |
| Public NOIP Round #1 (Div. 2, 普及) | 2022-09-10 14:00:00 | 3 hours 30 minutes | ★★ |
| Public Round #7 | 2022-07-31 08:00:00 | 5 hours | ★★★★ |
| Public Round #6 | 2022-07-03 08:00:00 | 5 hours | ★★★★★ |
| Public Round #5 | 2022-06-12 08:00:00 | 5 hours | ★★★★ |
| Public Round #4 | 2022-06-05 08:00:00 | 5 hours | ★★★★ |
| Public Easy Round #2 | 2022-05-01 08:00:00 | 5 hours | ★★★★ |
| Public Easy Round #1 | 2022-04-23 08:00:00 | 5 hours | ★★★★ |
| Public Round #3 | 2022-04-14 08:30:00 | 4 hours 30 minutes | ★★★★ |
| Public Round #2 | 2022-04-09 08:30:00 | 4 hours 30 minutes | ★★★★★ |
| Extra Public Round #1 | 2022-04-07 08:30:00 | 4 hours 30 minutes | ★★★ |
| Public Round #1 | 2022-04-03 08:30:00 | 4 hours 30 minutes | ★★★★ |
| Public Test Round #1 | 2022-03-29 12:00:00 | 60 hours | ? |