Олимпиадный тренинг

Задача 39655. Error


The value of an arithmetic expression
\(2 \cdot 4^{84} + 3\cdot4 ^{42}- 2\cdot4^{34}+ 2 \cdot 4^{17}+3\cdot 4^{3} +16\)
written in the number system with base 4. How many adjacent numbers "20" contained in this post?