Пожалуйста, прочтите новое правило об ограничении использования AI-инструментов.
→ Обратите внимание
→ Лидеры (рейтинг)
| № | Пользователь | Рейтинг |
|---|---|---|
| 1 | tourist | 4009 |
| 2 | jiangly | 3839 |
| 3 | Radewoosh | 3646 |
| 4 | jqdai0815 | 3620 |
| 4 | Benq | 3620 |
| 6 | orzdevinwang | 3612 |
| 7 | Geothermal | 3569 |
| 7 | cnnfls_csy | 3569 |
| 9 | ecnerwala | 3494 |
| 10 | Um_nik | 3396 |
| Страны | Города | Организации | Всё → |
→ Лидеры (вклад)
| № | Пользователь | Вклад |
|---|---|---|
| 1 | Um_nik | 164 |
| 2 | maomao90 | 160 |
| 3 | -is-this-fft- | 159 |
| 4 | atcoder_official | 158 |
| 4 | awoo | 158 |
| 4 | cry | 158 |
| 7 | adamant | 155 |
| 8 | nor | 154 |
| 9 | TheScrasse | 153 |
| 10 | maroonrk | 152 |
→ Найти пользователя
→ Прямой эфир
Codeforces (c) Copyright 2010-2024 Михаил Мирзаянов
Соревнования по программированию 2.0
Время на сервере: 29.09.2024 23:18:40 (i1).
Десктопная версия, переключиться на мобильную.
При поддержке
your unordered_map got an anti-hash test(unordered_map worst case look time O(n) due to all hashes colliding with each other). And because MS C++ 2017 is a different compiler, so unordered map hashing works a bit different. In whatever way, the three should get timelimit anyways. I recommend you not to use unordered_map in hackable contests or in sites that have system testing afterwards like codeforces.
At least it could have given TLE at the time of contest so i would have changed the unordered_map to map.
Sadly, authors usually don't usually think of anti-hashing tests but hackers do. Here is a really cool blog which helps if you want to use unordered_map.
But here all keys are ints and not int64_t/long longs, so their hashes do not (should not?) collide, so what's the real reason?
Numbers till $$$10^9$$$. At least not all hashes collide, but a lot of them. If numbers were only till $$$10^6$$$ or lower, I guess it was gonna pass.
Yeah, I did not realize that the hash function includes % bucket_count, thank you