Need help in 552C — Vanya and Scales

Правка en1, от rhezo, 2016-02-28 01:01:42

How to solve this 552C ?

Can anyone help with this, I am not able to come up with the idea and editorial is not very descriptive. Thanks!

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en1 Английский rhezo 2016-02-28 01:01:42 226 Initial revision (published)