cucu

#include <iostream>
#include <algorithm>
#include <time.h>
#include <chrono>

class Timer
{
public:
    Timer() : beg_(clock_::now()) {}
    void reset() { beg_ = clock_::now(); }
    double elapsed() const {
        return std::chrono::duration_cast<second_>
            (clock_::now() - beg_).count();
    }

private:
    typedef std::chrono::high_resolution_clock clock_;
    typedef std::chrono::duration<double, std::ratio<1> > second_;
    std::chrono::time_point<clock_> beg_;
};

int main()
{
    for (int i = 0; i < 50; i++)
    {

        Timer time;
        for (int j = 0; j < 1000;j++)
        {
        float rez = 0;
        double a[] = { 1, 2, 3, 4, 5, 6, 7, 8, 9 };
        int sol = 0;
        do {
            rez = a[0] + 13 * a[1] / a[2] + a[3] + 12 * a[4] - a[5] - 11 + a[6] * a[7] / a[8] - 10;
            if (rez == 66) {
                sol += 1;
                //std::cout << a[0] << a[1] << a[2] << a[3] << a[4] << a[5] << a[6] << a[7] << a[8]<<"\n";
            }
            if (sol == 10) break;
        } while (std::next_permutation(a, a + 9));
        }
        std::cout << time.elapsed() << "\n";
    }
    int zz = 0;
    std::cin >>zz;
}