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

int 
main(int argc, char *argv[])
{

	int i, n, x;
	x = 0;
	n = 1000;

	if (argc > 1) n = atoi(argv[1]);	
	#pragma omp parallel for shared(n) private (i) reduction(+ : x) 
	for (i = 0; i < n; ++i) x = x + 1;

      	/* end of parallel section */
	fprintf(stderr, "%d\n", x);
}