#include <thrust/host_vector.h>
#include <thrust/device_vector.h>
#include <thrust/generate.h>
#include <thrust/reduce.h>
#include <thrust/functional.h>
#include <algorithm>
#include <cstdlib>
#include <iostream>
using namespace std;

int generator() {
	return rand() % 5;
}

int main(void)
{
  // generate random data serially
  thrust::host_vector<int> h_vec(1000000);
  std::generate(h_vec.begin(), h_vec.end(), generator);

  // transfer to device and compute sum
  thrust::device_vector<int> d_vec = h_vec;
  int sum = thrust::reduce(d_vec.begin(), d_vec.end(), 0, thrust::plus<int>());
  cout << "sum = " << sum << endl; 
  return 0;
}