С++11

Код:

• #include <iostream>
• #include <string>
• int main() {
•    int k;
•    std::cin >> k;
•    std::string memo = std::to_string(k);
•    auto min_number = *std::min_element(memo.begin(), memo.end());
•    auto max_number = *std::max_element(memo.begin(), memo.end());
•    std::cout << "Max: " << max_number << "; Min: " << min_number << "." << std::endl;
• }