Editorial for 2157: Прямокутник
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.
Можна побачити, що усi клiтини, якi не знаходяться на межi, можна представити у виглядi прямокутника ~(n-2) \times (m-2)~.
Тож вiдповiддю буде ~n \times m-(n-2) \times (m-2) = 2 \times (n + m)-4~.
n = int(input()) m = int(input()) print((n + m) * 2 - 4)
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