Problem link : (http://codeforces.me/problemset/problem/166/E)
How to solve this problem log(n) with binary exponentiation of some 2 × 2 matrix into power n. Needs some explanation in this problem .Thanks in advance.
Sorry for bad english.
→ Pay attention
Before contest
CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
11:58:01
Register now »
CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
11:58:01
Register now »
*has extra registration
→ Streams
→ Top rated
| # | User | Rating |
|---|---|---|
| 1 | tourist | 4009 |
| 2 | jiangly | 3823 |
| 3 | Benq | 3738 |
| 4 | Radewoosh | 3633 |
| 5 | jqdai0815 | 3620 |
| 6 | orzdevinwang | 3529 |
| 7 | ecnerwala | 3446 |
| 8 | Um_nik | 3396 |
| 9 | ksun48 | 3390 |
| 10 | gamegame | 3386 |
→ Top contributors
| # | User | Contrib. |
|---|---|---|
| 1 | cry | 167 |
| 2 | Um_nik | 163 |
| 3 | maomao90 | 162 |
| 4 | atcoder_official | 161 |
| 5 | adamant | 159 |
| 6 | -is-this-fft- | 158 |
| 7 | awoo | 157 |
| 8 | TheScrasse | 154 |
| 9 | Dominater069 | 153 |
| 9 | nor | 153 |
→ Find user
→ Recent actions
Codeforces (c) Copyright 2010-2024 Mike Mirzayanov
The only programming contests Web 2.0 platform
Server time: Nov/23/2024 05:37:00 (i2).
Desktop version, switch to mobile version.
Supported by
Not sure how to do it with a 2x2 matrix, but I solved this problem by exponentiating a 4x4 adjacency matrix. I'm guessing the 2x2 solution somehow exploits the symmetry in the tetrahedron.