→ Virtual participation
Virtual contest is a way to take part in past contest, as close as possible to participation on time. It is supported only ICPC mode for virtual contests.
If you've seen these problems, a virtual contest is not for you - solve these problems in the archive.
If you just want to solve some problem from a contest, a virtual contest is not for you - solve this problem in the archive.
Never use someone else's code, read the tutorials or communicate with other person during a virtual contest.
→ Practice?
Want to solve the contest problems after the official contest ends? Just register for practice and you will be able to submit solutions.
→ Status filter
→ Contest materials
Problem I - Best Friend, Worst Enemy
Contest status
| # | When | Who | Problem | Lang | Verdict | Time | Memory |
|---|---|---|---|---|---|---|---|
| 298039694 | Dec/23/2024 14:31 |
 北京大学 - 赤橙黄绿蓝紫 - 蒋凌宇, 钱易, |
I - Best Friend, Worst Enemy | Unknown | Accepted | 0 ms | 0 KB |
| 298040888 | Dec/23/2024 14:31 |
清华大学 - 一路向北 - 许庭强, 唐绍轩, 周航锐 |
I - Best Friend, Worst Enemy | Unknown | Accepted | 0 ms | 0 KB |
| 334207470 | Aug/17/2025 05:19 | Nightsky-yekong | I - Best Friend, Worst Enemy | C++20 (GCC 13-64) | Accepted | 593 ms | 7900 KB |
| 334152490 | Aug/16/2025 08:32 | ORZXY | I - Best Friend, Worst Enemy | C++20 (GCC 13-64) | Accepted | 671 ms | 7900 KB |
| 391808015 | Sep/23/2026 20:39 | adl | I - Best Friend, Worst Enemy | C++23 (GCC 14-64, msys2) | Accepted | 250 ms | 2500 KB |
| 391807972 | Sep/23/2026 20:38 | adl | I - Best Friend, Worst Enemy | C++23 (GCC 14-64, msys2) | Accepted | 218 ms | 2600 KB |
| 391807834 | Sep/23/2026 20:37 | adl | I - Best Friend, Worst Enemy | C++23 (GCC 14-64, msys2) | Accepted | 265 ms | 2600 KB |
| 391807855 | Sep/23/2026 20:37 | adl | I - Best Friend, Worst Enemy | C++23 (GCC 14-64, msys2) | Accepted | 312 ms | 2600 KB |
| 391807918 | Sep/23/2026 20:38 | adl | I - Best Friend, Worst Enemy | C++23 (GCC 14-64, msys2) | Accepted | 218 ms | 2600 KB |
| 386301227 | Aug/09/2026 12:08 | zhengly2003 | I - Best Friend, Worst Enemy | C++20 (GCC 13-64) | Accepted | 1156 ms | 22100 KB |
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