_QWOiNYUIVMPFSBKLiGSMAP_'s blog

By _QWOiNYUIVMPFSBKLiGSMAP_, history, 21 month(s) ago, In English,

http://codeforces.com/contest/157/problem/D

or anyone comment with a link of a tutorial.

 
 
 
 
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21 month(s) ago, # |
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The tutorial for that round is here.

In general, if the tutorial isn't linked to the round, you can search the round number to find the tutorial.