auto findmin(const std::array<int, 3> a) -> int {
  int min = a[0];
  for (int i = 1; i < 3; ++i) {
    if (a[i] < min)
      min = a[i];
  }
  return min;
}

auto findmin(const std::array<double, 4> a) -> double {
  double min = a[0];
  for (int i = 1; i < 4; ++i) {
    if (a[i] < min)
      min = a[i];
  }
  return min;
}