The problems:
My thoughts:
Magic Portals
Surprise Birthday
Roaming
Please help me in getting a solution to each of these problems.
Note: Contest ended a long time ago so don't worry about possible cheating.
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1 | tourist | 3880 |
2 | jiangly | 3669 |
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4 | Benq | 3627 |
5 | orzdevinwang | 3612 |
6 | Geothermal | 3569 |
6 | cnnfls_csy | 3569 |
8 | jqdai0815 | 3532 |
9 | Radewoosh | 3522 |
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Страны | Города | Организации | Всё → |
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1 | awoo | 161 |
2 | maomao90 | 160 |
3 | adamant | 156 |
4 | maroonrk | 153 |
5 | atcoder_official | 149 |
6 | -is-this-fft- | 148 |
6 | SecondThread | 148 |
8 | Petr | 147 |
9 | nor | 144 |
10 | cry | 143 |
Three problems I need help in solving
Since the maximum possible number of pairings is $$$10395$$$, I could just check all possible pairings for a cycle. But I'm not sure how I would implement this.
I have no clue. I do not think a brute force would work here.
I can precalculate shortest paths between the pharmacies, fixing the starting and ending. Then for every other vertex, I could take the minimum over all choices of starting and ending pharmacies. Then I could take the overall minimum. It works, but I'm having trouble implementing so much neatly.
Please help me in getting a solution to each of these problems.
Note: Contest ended a long time ago so don't worry about possible cheating.
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