Олимпиадный тренинг

Задача 39653. Error


The value of an arithmetic expression
\(3 \cdot 4^{8072} - 2 \cdot 16^{512} - 3 \cdot 8^{128 } - 1024\)
written in base 16 number system. How many adjacent pairs of digits "FC" contained in this post?