shortest single cycle in an unweighted graph n<=1e6
→ Обратите внимание
→ Лидеры (рейтинг)
| № | Пользователь | Рейтинг |
|---|---|---|
| 1 | tourist | 4009 |
| 2 | jiangly | 3831 |
| 3 | Radewoosh | 3646 |
| 4 | jqdai0815 | 3620 |
| 4 | Benq | 3620 |
| 6 | orzdevinwang | 3529 |
| 7 | ecnerwala | 3446 |
| 8 | Um_nik | 3396 |
| 9 | gamegame | 3386 |
| 10 | ksun48 | 3373 |
| Страны | Города | Организации | Всё → |
→ Лидеры (вклад)
| № | Пользователь | Вклад |
|---|---|---|
| 1 | cry | 164 |
| 1 | maomao90 | 164 |
| 3 | Um_nik | 163 |
| 4 | atcoder_official | 160 |
| 5 | -is-this-fft- | 158 |
| 6 | awoo | 157 |
| 6 | adamant | 157 |
| 8 | TheScrasse | 154 |
| 8 | nor | 154 |
| 10 | Dominater069 | 153 |
→ Найти пользователя
→ Прямой эфир
Codeforces (c) Copyright 2010-2024 Михаил Мирзаянов
Соревнования по программированию 2.0
Время на сервере: 31.10.2024 15:06:18 (g1).
Десктопная версия, переключиться на мобильную.
При поддержке
Is it a directed or an undirected graph?
If it's an undirected graph, you can construct a DFS Tree, and every back-edge defines a cycle
Shortest cycle length here $$$= 3$$$, not defined by only one back edge
I think this can help you
orz dequy hai
dijme pupil rack
It can't be solved in better than $$$O(nm)$$$, where $$$m$$$ is the number of edges.
https://en.m.wikipedia.org/wiki/Girth_(graph_theory)#Computation
i can help u, ib for the perfect solution