#include <iostream>
#include <valarray>
int main() {
std::valarray<int> va_int(4);
std::cout << "break here";
va_int[0] = 1;
va_int[1] = 12;
va_int[2] = 123;
va_int[3] = 1234;
std::valarray<double> va_double({1.0, 0.5, 0.25, 0.125});
std::valarray<int> va({10, 11, 12, 13, 14, 15, 16, 17, 18, 19});
std::slice_array<int> sa = va[std::slice(1, 4, 2)];
std::gslice_array<int> ga = va[std::gslice(
3, std::valarray<std::size_t>(3, 1), std::valarray<std::size_t>(1, 1))];
std::mask_array<int> ma = va[std::valarray<bool>{false, true, true}];
std::indirect_array<int> ia = va[std::valarray<size_t>{3, 6, 9}];
std::cout << "break here\n";
}