How to solve this kattis problem? It is a multi-source but not once, one by one. You should count the number of vertices with the distance at least k after each source is added. Restarting dijkstra every time is not enough.
Thanks.
→ Обратите внимание
До соревнования
Rayan Programming Contest 2024 - Selection (Codeforces Round 989, Div. 1 + Div. 2)
18:44:29
Зарегистрироваться »
Rayan Programming Contest 2024 - Selection (Codeforces Round 989, Div. 1 + Div. 2)
18:44:29
Зарегистрироваться »
*есть доп. регистрация
→ Лидеры (рейтинг)
| № | Пользователь | Рейтинг |
|---|---|---|
| 1 | tourist | 3993 |
| 2 | jiangly | 3743 |
| 3 | orzdevinwang | 3707 |
| 4 | Radewoosh | 3627 |
| 5 | jqdai0815 | 3620 |
| 6 | Benq | 3564 |
| 7 | Kevin114514 | 3443 |
| 8 | ksun48 | 3434 |
| 9 | Rewinding | 3397 |
| 10 | Um_nik | 3396 |
| Страны | Города | Организации | Всё → |
→ Лидеры (вклад)
| № | Пользователь | Вклад |
|---|---|---|
| 1 | cry | 167 |
| 2 | Um_nik | 163 |
| 3 | maomao90 | 162 |
| 3 | atcoder_official | 162 |
| 5 | adamant | 159 |
| 6 | -is-this-fft- | 158 |
| 7 | awoo | 155 |
| 8 | TheScrasse | 154 |
| 9 | Dominater069 | 153 |
| 10 | djm03178 | 152 |
→ Найти пользователя
→ Прямой эфир
Codeforces (c) Copyright 2010-2024 Михаил Мирзаянов
Соревнования по программированию 2.0
Время на сервере: 29.11.2024 22:50:31 (l1).
Десктопная версия, переключиться на мобильную.
При поддержке
Take advantage of K being small. Maybe incorporate into state somehow?
Define nodes based on two parameters (location, distance from alien base). Run a modified Dijkstra where you find the minimum input id of an alien base that can reach each node. This works because if two alien bases can both reach a town with the same distance D, then for all other nodes reachable from this node, the base with smaller id will always get there earlier.
Srry, I don't understand your solution. Can you describe little bit more about it? Or provide code if you have written it. Thanks.
https://ideone.com/ER1jNn
Thanks, I got it. By the way, isn't there more standard (closer to standard dijkstra) solution?