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Автор - Lika48910

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Автор - x0xx0x0x
Формула Пика:
Узлы внутри фигуры + узлы на контуре/2 - 1
Узлы внутри фигуры: 9
Узлы по контуру: 8
9+8/2-1=9+4-1=12
Ответ: 12

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