How can i develop my skill to solve problem C & D in div 2?

Правка en1, от flash_7, 2015-07-16 14:04:10

I'm struggling to solve problem C in Codeforces div 2 round.I can solve B very quickly but barely solved problem C.Can anyone give me some suggestions how can i prepere myself to gain the capability to solve problem C?

История

 
 
 
 
Правки
 
 
  Rev. Язык Кто Когда Δ Комментарий
en1 Английский flash_7 2015-07-16 14:04:10 277 Initial revision (published)