#include <cmath>
#include <iostream>
#include <vector>

int main() {
    short negative = 0, pos = 0;
    double* array_all = (double*)malloc(12 * sizeof(double));   //all elements
    double* array_second = NULL;                    //elements after the second negative
    for(int i = 0; i < 12; ++i) {
        double tmp = 4.4 * std::tan(2.1 * (i + 1)) + (12.16 * std::pow(i + 1, 3.0) + std::cos(2.0 * (i + 1)))
            / (3.0 * (2.0 * std::exp(1.1 * (i + 1)) - 0.6));
        array_all[i] = tmp;
        if(tmp < 0) ++negative;
        if(negative >= 2) {
            if(array_second == NULL) {
                pos = i;
                array_second = (double*)malloc((12 - pos + 1) * sizeof(double));
            }
            array_second[i - pos] = tmp;
        }
    }
    //additional code here

    free(array_all);
    free(array_second);
    return 0;
}