#include <iostream>
#include <tuple>
using namespace std;
 
struct S { int a; char b; double c; };
auto const S_fields = [](S const& z) -> auto { return tie(z.a, z.b, z.c); };
 
bool operator == (S const& x, S const& y)
{
	return S_fields(x) == S_fields(y);
}
bool operator < (S const& x, S const& y)
{
	return S_fields(x) < S_fields(y);
}
 
int main() {
	S p { 1,2,3 }, q {1,2,4};
	cout << (p == p) << (p == q) << (p < p) << (p < q) << (q < p) << endl;
	return 0;
}

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