AtCoder Beginner Contest 061 will be held.
Time: May 13th (Saturday), 21:00 JST
Duration: 100 minutes
Number of Tasks: 4
writer: Hec
Rating: 0-1199
The point values are: 100 — 200 — 300 — 400
We are looking forward to your participation!
# | User | Rating |
---|---|---|
1 | tourist | 3757 |
2 | jiangly | 3647 |
3 | Benq | 3581 |
4 | orzdevinwang | 3570 |
5 | Geothermal | 3569 |
5 | cnnfls_csy | 3569 |
7 | Radewoosh | 3509 |
8 | ecnerwala | 3486 |
9 | jqdai0815 | 3474 |
10 | gyh20 | 3447 |
# | User | Contrib. |
---|---|---|
1 | maomao90 | 171 |
2 | awoo | 164 |
3 | adamant | 163 |
4 | TheScrasse | 159 |
5 | maroonrk | 155 |
6 | nor | 154 |
7 | -is-this-fft- | 152 |
8 | Petr | 147 |
9 | orz | 145 |
10 | pajenegod | 144 |
AtCoder Beginner Contest 061 will be held.
Time: May 13th (Saturday), 21:00 JST
Duration: 100 minutes
Number of Tasks: 4
writer: Hec
Rating: 0-1199
The point values are: 100 — 200 — 300 — 400
We are looking forward to your participation!
Name |
---|
Please inform me about the contest's difficulty. Is it suitable for div. 2 ?
How to solve D ?
My idea was to make all the weights negative, and then apply Bellman Ford. If there was any negative cycle the answer would be "inf", else "-1 * dist[N]".
However, i got WA on the last 3 cases. Any help where am i wrong?
Anybody can share accepted code of D?
Yes
In the case that the negative cycle is not found on the path from 1 to N, then the answer should not be inf. For example the answer to the following case should be 1, not inf. 5 5 1 2 1 2 3 1 3 4 1 4 2 1 1 5 1