#include <any>

#include <cstdio>

#include <variant>

static_assert(std::variant_size_v<std::variant<>> == 0);

static_assert(std::variant_size_v<std::variant<int>> == 1);

static_assert(std::variant_size_v<std::variant<int, int>> == 2);

static_assert(std::variant_size_v<std::variant<int, int, int>> == 3);

static_assert(std::variant_size_v<std::variant<int, float, double>> == 3);

static_assert(std::variant_size_v<std::variant<std::monostate, void>> == 2);

static_assert(std::variant_size_v<std::variant<const int, const float>> == 2);

static_assert(std::variant_size_v<std::variant<std::variant<std::any>>> == 1);

int main() {

std::puts("All static assertions passed.");

}