#include <immintrin.h>
#include <math.h>

void prefix_sum_sequential(double *out, const double *in, int N) {
  out[0] = in[0];
  for (int i = 1; i < N; ++i) {
    out[i] = in[i] + out[i - 1];
  }
}

void prefix_sum_parallel(double *out, const double *in, int N) {

  // TODO: FILL_IN_HERE
}