#pragma once

#include <span>
#include <vector>

namespace cpp20 {

[[nodiscard]] auto span_sum(std::span<const int> data) -> int;
[[nodiscard]] auto first_and_last(std::span<const int> data) -> std::pair<int, int>;
[[nodiscard]] auto make_subspan(std::span<const int> data, std::size_t offset, std::size_t count)
    -> std::vector<int>;

}  // namespace cpp20