#include <iostream>
#include <functional>

struct execute {
    const unsigned long long n;

    void operator() (std::function<void()> what) {
        for (auto i = 0; i < n; i++)
            what();
    }

    void operator() (std::function<void(unsigned long long)> what) {
        for (auto i = 0; i < n; i++)
            what(i);
    }
};

execute operator"" _times(unsigned long long n) {
    return execute{n};
}

int main() {
    3_times([]{
        std::cout << "bla" << std::endl;
    });

    auto twice = 2_times;

    twice([]{
        std::cout << "blup" << std::endl;
    });

    3_times([](auto i) {
        std::cout << "counting: " << i << std::endl;
    });
}