KACTL ModMul. It says that it runs around 2x faster than naive
(__int128_t)a * b % M
When I ran my benchmarks with -O2, the results were similar. Am I mistaken?
→ Обратите внимание
→ Лидеры (рейтинг)
| № | Пользователь | Рейтинг |
|---|---|---|
| 1 | Benq | 3857 |
| 2 | jiangly | 3810 |
| 3 | maroonrk | 3534 |
| 4 | tourist | 3528 |
| 5 | Kevin114514 | 3510 |
| 6 | turmax | 3411 |
| 7 | Um_nik | 3387 |
| 8 | Radewoosh | 3367 |
| 9 | heuristica | 3322 |
| 10 | strapple | 3317 |
| Страны | Города | Организации | Всё → |
→ Лидеры (вклад)
| № | Пользователь | Вклад |
|---|---|---|
| 1 | Qingyu | 158 |
| 2 | maspy | 150 |
| 3 | Um_nik | 146 |
| 4 | Errichto | 139 |
| 5 | adamant | 136 |
| 6 | maroonrk | 134 |
| 7 | DNR | 133 |
| 8 | Dominater069 | 131 |
| 9 | Proof_by_QED | 130 |
| 9 | nik_exists | 130 |
→ Найти пользователя
→ Прямой эфир
Codeforces (c) Copyright 2010-2026 Михаил Мирзаянов
Соревнования по программированию 2.0
Время на сервере: 03.09.2026 17:16:28 (g2).
Десктопная версия, переключиться на мобильную.
При поддержке
This is only one mod operation, try doing more operations and benchmarking.
I did that. I did 1e5 runs and their running time was basically the same.
1e5 operations is not very many. That should take around 1 millisecond. Try something like 1e10 of them to spot a consistent difference. Also make sure the compiler can't optimize it out.