In problem , symmetric grid , can anyone give the proof why the method given in the editorial works . how to perform all rows and column swapping operation .
Anyone .
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A good problem from atcoder regular contest .
Revision en1, by vintage_Petr_Mitrichev, 2019-02-20 00:50:30
History
Revisions
| Rev. | Lang. | By | When | Δ | Comment | |
|---|---|---|---|---|---|---|
| en1 |
|
vintage_Petr_Mitrichev | 2019-02-20 00:50:30 | 333 | Initial revision (published) |
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