Can someone help me with this problem http://www.spoj.pl/problems/HIST2 ?
I know how to solve the maximum perimeter, but how can I count the number of permutations?
Can someone help me with this problem http://www.spoj.pl/problems/HIST2 ?
I know how to solve the maximum perimeter, but how can I count the number of permutations?
№ | Пользователь | Рейтинг |
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1 | tourist | 3690 |
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 |
Страны | Города | Организации | Всё → |
№ | Пользователь | Вклад |
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1 | maomao90 | 174 |
2 | awoo | 165 |
3 | adamant | 161 |
4 | TheScrasse | 160 |
5 | nor | 158 |
6 | maroonrk | 156 |
7 | -is-this-fft- | 152 |
8 | orz | 146 |
9 | SecondThread | 145 |
9 | pajenegod | 145 |
Название |
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Look at the constraints. N <= 15 is shouting bitmasks.
Generally speaking, if a state S can be reached from the states A1,A2,A3....AK, and the function G(state) is the number of ways to generate the state. We have that:
G(S) = G(A1)+G(A2)+G(A3)....+G(AK)
Hope it helps.
You mean to do a function to calculate maximum and another one that count the permutations?
I try to code that problem ... here's my code ... http://pastebin.com/MKUZA75W ... but it doesn't count properly the permutations ... :(
I am getting TLE in this question . Did you solve it ? I used dp+ bitmask . Here is the link for code : http://ideone.com/vnLa8S Can you tell how to optimise it .