Unable to solve the problem Editorial is also not available . Can anybody explain? Thanks in advance:)
№ | Пользователь | Рейтинг |
---|---|---|
1 | tourist | 4009 |
2 | jiangly | 3839 |
3 | Radewoosh | 3646 |
4 | jqdai0815 | 3620 |
4 | Benq | 3620 |
6 | orzdevinwang | 3612 |
7 | Geothermal | 3569 |
7 | cnnfls_csy | 3569 |
9 | ecnerwala | 3494 |
10 | Um_nik | 3396 |
Страны | Города | Организации | Всё → |
№ | Пользователь | Вклад |
---|---|---|
1 | Um_nik | 164 |
2 | maomao90 | 160 |
3 | -is-this-fft- | 159 |
4 | atcoder_official | 158 |
4 | cry | 158 |
4 | awoo | 158 |
7 | adamant | 155 |
8 | nor | 154 |
9 | TheScrasse | 153 |
10 | maroonrk | 152 |
Unable to solve the problem Editorial is also not available . Can anybody explain? Thanks in advance:)
Название |
---|
Store an array b where b[i] is the sum of all aj = i
So in the sample, b would be {2, 10, 6}, the problem turns into a simple DP problem, if you are at state i you have 2 options:
1) leave b[i] and move to state i + 1
2) take b[i] and move to state i + R + 1
Giving WA:(
It will be wrong for test case 1 2 1 2 1 3
Sorry missed one more thing, you should set R = min(L, R)
because if you start taking elements in increasing order, then the difference between every consecutive values should be at least R
and if you start taking elements in decreasing order, then the difference between every two consecutive values should be at least L
The optimal solution is to choose the order which gives the minimum difference between consecutive values which is min(L, R)
code
Thanks:) Got it.
hey mate can u explain why it should be min(l,r) and not max(l,r)?? update :-> i got it,still thanks!!
It can be done with this way as well: do DP twice..from index 0 and going to right with distance R and from index 1e5 with distance L, then pick the maximum of the two values obtained.