Tariqul's blog

Codeforces Beta Round #63 (Div. 2) Problem D
By Tariqul, 15 years ago, In English
The problem statement says that:
Also each player can once per game symmetrically reflect a dot relatively to the line y = x.
What does it mean? Can anyone clarify me please?

Thanks.
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15 years ago, hide # |
 
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It means dot with coordinates (x0, y0) turns to dot with coordinates (y0, x0).
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