can anyone suggest approach to solve this problem?
https://codeforces.net/gym/102157/problem/3
# | User | Rating |
---|---|---|
1 | tourist | 3803 |
2 | jiangly | 3707 |
3 | Benq | 3627 |
4 | ecnerwala | 3584 |
5 | orzdevinwang | 3573 |
6 | Geothermal | 3569 |
6 | cnnfls_csy | 3569 |
8 | Radewoosh | 3542 |
9 | jqdai0815 | 3532 |
10 | gyh20 | 3447 |
# | User | Contrib. |
---|---|---|
1 | maomao90 | 170 |
2 | awoo | 164 |
3 | adamant | 162 |
4 | maroonrk | 152 |
5 | -is-this-fft- | 151 |
6 | nor | 150 |
7 | atcoder_official | 148 |
7 | SecondThread | 148 |
9 | TheScrasse | 146 |
10 | Petr | 145 |
can anyone suggest approach to solve this problem?
https://codeforces.net/gym/102157/problem/3
Name |
---|
I think for this problem you're DP state is going to be DP[current index on first row][what elements are matched on bottom row]
We can use a bitmask to represent what elements are matched on the bottom row (with respect to our current index on the first row). Because e <= 4, the we only need to consider "windows" of length 9, so our bit mask goes to 2^9 which is 512. Transitions then become trivial.
I believe the overall complexity is O(N * 2^(2E+1) + N*K).
Thank you...
Can you please elaborate. Can you provide recurrence relation?