Модуль: Systems of logical equations


Задача

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System of logical equations - 23

Теория

When recombining the system, it is possible to duplicate some of the "movable" parts to make it easier to make arrows.

Задача

How many different solutions does a system of logical equations have?
(x1→x2)*(x2→x3)*(x3→x4)=1
(y4→x4)*(y3→x3)*(y2→x2)*(y1→x1)=1

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