Съдържание

IOM 2020, Блиц — Задача 67

The Blitz-contest of IOM-2020

Let $f$ be a function that maps every positive integer $n$ to the number of decimal digits of $n$ . Find $f(f(2020^{2021}))$ .

The source contains only the answer key, no worked solution.

Оригинал в Архива: iom-2020-blitz-tasks.pdf · официални решения: iom-2020-blitz-answers.pdf