Editorial for Mock CCC '20 Contest 1 J3 - A Geometry Problem
Remember to use this editorial only when stuck, and not to copy-paste code from it. Please be respectful to the problem author and editorialist.
Submitting an official solution before solving the problem yourself is a bannable offence.
Submitting an official solution before solving the problem yourself is a bannable offence.
The desired area is .
To print it accurate to two decimal places, the exact area should be stored in a 64-bit integer and then either .00, .25, .50, or .75 depending on the remainder of divided by 4.
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