A good problem from atcoder regular contest .

Revision en1, by vintage_Petr_Mitrichev, 2019-02-20 00:50:30

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 .

Editorial

Anyone .

History

 
 
 
 
Revisions
 
 
  Rev. Lang. By When Δ Comment
en1 English vintage_Petr_Mitrichev 2019-02-20 00:50:30 333 Initial revision (published)