How to count the number of rectanglular submatrix with all 1s in a binary square matrix of size N in O(N^2)?
i have a solution for o(N^3)
→ Pay attention
→ Top rated
| # | User | Rating |
|---|---|---|
| 1 | jiangly | 4039 |
| 2 | tourist | 3841 |
| 3 | jqdai0815 | 3682 |
| 4 | ksun48 | 3590 |
| 5 | ecnerwala | 3542 |
| 6 | Benq | 3535 |
| 7 | orzdevinwang | 3526 |
| 8 | gamegame | 3477 |
| 9 | heuristica | 3357 |
| 10 | Radewoosh | 3355 |
→ Top contributors
| # | User | Contrib. |
|---|---|---|
| 1 | cry | 168 |
| 2 | -is-this-fft- | 165 |
| 3 | atcoder_official | 160 |
| 3 | Um_nik | 160 |
| 5 | djm03178 | 157 |
| 6 | Dominater069 | 156 |
| 7 | adamant | 153 |
| 8 | luogu_official | 152 |
| 9 | awoo | 151 |
| 10 | TheScrasse | 147 |
→ Find user
→ Recent actions
History
Revisions
| Rev. | Lang. | By | When | Δ | Comment | |
|---|---|---|---|---|---|---|
| en1 |
|
zeref_dragoneel | 2016-07-16 02:30:57 | 183 | Initial revision (published) |
Codeforces (c) Copyright 2010-2025 Mike Mirzayanov
The only programming contests Web 2.0 platform
Server time: Jan/22/2025 16:01:28 (i1).
Desktop version, switch to mobile version.
Supported by
