#include <iostream>
#include <stdlib.h>
#include <cmath>
double seriesTaylor(int start, int endN)
{
    std::cout << start << " " << endN << std::endl;
    int i = start;
    int n = endN;
    double a = 1.;
    double d = 0., f = 0.;
    double pi = 0.;
    for (i; i <= n; i++)
    {
        d = (double)1/(i+2);
        f = (double)pow(-1, i) * d;
        a += f;
    }
    pi = 4*a;
    std::cout << pi << std::endl;
    return pi;
}
int main (int argc, char *argv[])
{
double d = 0;
d += seriesTaylor(1, 250);
d += seriesTaylor(250, 500);
d += seriesTaylor(500, 750);
d += seriesTaylor(750, 1000);
std::cout << d << std::endl;
std::cout << seriesTaylor(1, 1000) << std::endl;
std::cout << "SubValue: " << seriesTaylor(1, 250) << std::endl;
std::cout << "SubValue: " << seriesTaylor(250, 500) << std::endl;
std::cout << "SubValue: " << seriesTaylor(500, 750) << std::endl;
std::cout << "SubValue: " << seriesTaylor(750, 1000) << std::endl;

}