How to solve D from Codeforces Round #609

[anon4057137]

How to solve the D question from today’s Codeforces contest.

[anon55659401]

I answered your query…

[denjell]

Do you mean Div1 or Div2 contest? Both are 609

[anon73162591]

Div 2 : Domino for young, i think so