#include <omp.h>

long long int sum(int *v, long long int N){
	long long int i, sum_local, sum = 0;
	int myid, nthreads;

	#pragma offload target(mic) in(v:length(N))
	{
		#pragma omp parallel private(i, myid, sum_local)
		{
			myid = omp_get_thread_num();
			#pragma omp single
			nthreads = omp_get_num_threads();

			sum_local = 0;
			for(i = myid; i < N; i += nthreads)
				sum_local += v[i];

			#pragma omp atomic
			sum += sum_local;
		}
	}
	
	return sum;
}