Can anyone explain O(log(n)) solution for this problem with matrix power.
Thanks for your helping!
# | User | Rating |
---|---|---|
1 | jiangly | 3640 |
2 | Benq | 3593 |
3 | tourist | 3572 |
4 | orzdevinwang | 3561 |
5 | cnnfls_csy | 3539 |
6 | ecnerwala | 3534 |
7 | Radewoosh | 3532 |
8 | gyh20 | 3447 |
9 | Rebelz | 3409 |
10 | Geothermal | 3408 |
# | User | Contrib. |
---|---|---|
1 | maomao90 | 173 |
2 | adamant | 164 |
3 | awoo | 161 |
4 | TheScrasse | 160 |
5 | nor | 159 |
6 | maroonrk | 156 |
7 | SecondThread | 152 |
8 | pajenegod | 146 |
9 | BledDest | 144 |
10 | Um_nik | 143 |
Name |
---|
The fastest matrix multiplication algorithm is Strassen_algorithm then you have to apply Binary Exponentiation .
Tetrahedron can be represented as a graph with 4 vertices and problem is to count number of ways with fixed length K. There is an explanation of the solution with matrix exponentiation: here