#include <stdio.h>
#include <stdlib.h>
#include <omp.h>


int main(void)
{
    double arr[] = { -7, 2, 5, -2, 4, 5, -6 };
    double res = 1;

    #pragma omp parallel for default(none) shared(arr) reduction(*:res)
    for (size_t i = 0; i < sizeof(arr)/sizeof(*arr); i++)
        res *= arr[i] > 0 ? arr[i] : 1;

    printf("%f\n", res);
}