#include <stdlib.h>
#include <iostream>

#define SIZE 500000000

double t[SIZE];

int main(int argc, char *argv[]) 
{
        int size = SIZE;
	if (argc == 2) size = atoi(argv[1]);
	
        double sum1 = 0, sum2=0;
        t[100] = t[size/2+1] = 1.0;


#pragma omp parallel sections
	{
#pragma omp section
		for (int i=0; i<size/2; i++) {
			sum1 += t[i];
		}

#pragma omp section
		for (int i=size/2; i<size; i++) {
			sum2 += t[i];
		}

	}

	std::cout << "sum = " << sum1+sum2 << std::endl;
	return 0;
}