Help with this problem

Revision en1, by dougalves, 2019-07-02 01:37:19

anyone can help me at this problem? i can't understand the editorial's solution with fenwick tree.

History

 
 
 
 
Revisions
 
 
  Rev. Lang. By When Δ Comment
en1 English dougalves 2019-07-02 01:37:19 168 Initial revision (published)