Олимпиадный тренинг

Задача 39654. Error


The value of an arithmetic expression
\(3 \cdot 8^{112} - 2\cdot8 ^{78}+4\cdot8^{63}- 2 \cdot 8^{35}-8^{8} -52\)
written in the number system with base 8. How many digits other than 7, are in this entry?