#include <stdio.h>
#include <string.h>
#include "mpi.h"

int main(int argc, char** argv)
{
    int n = atoi(argv[1]), i;
    double total;
    MPI_Init( &argc, &argv );        
    total = 0.0;
    for(i = 1; i <= n; i++)
    {
        if(i % 4 == 1)
        {
            total += 1.0 / i;
        }
        else if (i % 4 == 3)
        {
            total -= 1.0 / i;
        }
    }
    printf("Pi = %.32f for %d iterations.\n", total * 4, n);
    MPI_Finalize();
    return 0;
}