Current or upcoming contests
| Name | Start time | Duration | Difficulty |
|---|
Ended contests
Looking for a specific contest? Visit the
categories page to browse contests organized by source.
| Name | Start time | Duration | Difficulty |
|---|
| Public Round #16 | Not set | 5 hours | ? |
| Public Easy Round #4 | Not set | 5 hours | ? |
| Public Round #15 | Not set | 4 hours 30 minutes | ★★★★☆ |
| Public Round #14 | | 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 | | 5 hours | ★★★★ |
| Public Round #12 | | 4 hours 30 minutes | ★★★★ |
| Public NOIP Round #6 (Div. 1, 提高) | | 4 hours | ★★★ |
| Public NOIP Round #6 (Div. 2, 普及) | | 3 hours 30 minutes | ★★ |
| Public Round #11 | | 5 hours | ★★★★ |
| Public Round #10 | | 5 hours 20 minutes | ★★★★ |
| Public Round #9 | | 5 hours | ★★★★ |
| Public Round #8 | | 5 hours | ★★★★ |
| Public NOIP Round #5 (Div. 1, 提高) | | 4 hours 30 minutes | ★★★ |
| Public CTS Round 1 Day 2 | | 5 hours | ★★★★★★ |
| Public CTS Round 1 Day 1 | | 5 hours | ★★★★★★ |
| Public NOIP Round #4 (Div. 1, 提高) | | 4 hours 30 minutes | ★★★ |
| Public NOIP Round #4 (Div. 2, 普及) | | 3 hours 30 minutes | ? |
| Public NOIP Round #3 (Div. 1, 提高) | | 4 hours 30 minutes | ★★★ |
| Public NOIP Round #3 (Div. 2, 普及) | | 3 hours 30 minutes | ★★ |
| Public NOIP Round #2 (Div. 1, 提高) | | 4 hours 30 minutes | ★★★ |
| Public NOIP Round #2 (Div. 2, 普及) | | 3 hours 30 minutes | ★★ |
| Public Easy Round #3 | | 5 hours | ★★★ |
| Public NOIP Round #1 (Div. 1, 提高) | | 4 hours | ★★★ |
| Public NOIP Round #1 (Div. 2, 普及) | | 3 hours 30 minutes | ★★ |
| Public Round #7 | | 5 hours | ★★★★ |
| Public Round #6 | | 5 hours | ★★★★★ |
| Public Round #5 | | 5 hours | ★★★★ |
| Public Round #4 | | 5 hours | ★★★★ |
| Public Easy Round #2 | | 5 hours | ★★★★ |
| Public Easy Round #1 | | 5 hours | ★★★★ |
| Public Round #3 | | 4 hours 30 minutes | ★★★★ |
| Public Round #2 | | 4 hours 30 minutes | ★★★★★ |
| Extra Public Round #1 | | 4 hours 30 minutes | ★★★ |
| Public Round #1 | | 4 hours 30 minutes | ★★★★ |
| Public Test Round #1 | | 60 hours | ? |