Need help to solve the problem 213c

Revision en1, by sirish_kp, 2016-10-29 09:11:58

I'm not clear with the explanation in editorial for problem 213C. Can someone explain me clearly how to approach this problem. Thanks for your help.

History

 
 
 
 
Revisions
 
 
  Rev. Lang. By When Δ Comment
en1 English sirish_kp 2016-10-29 09:11:58 183 Initial revision (published)