#include <cassert>
#include <string>
#include <string_view>

using namespace std;

template <typename T0, typename... Ts>
bool EqualsToOneOf(const T0& v0, const Ts&... vs) {

    if constexpr (sizeof...(vs) != 0) {
        return (v0 == vs) && EqualsToOneOf(v0, vs...);
    }
    return v0 == vs;
}

int main() {
    assert(EqualsToOneOf("hello"sv, "hi"s, "hello"s));
    assert(!EqualsToOneOf(1, 10, 2, 3, 6));
    assert(!EqualsToOneOf(8));
}