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#include <iostream>using namespace std;class Cc {	private:		Aa *aa;	public:		Cc(int a) {			std::cout << "a=" << a << std::endl;		}};class Bb {	private:		Cc *c;	public:		Bb(Cc&) { }};class Aa {	private:		Bb *b;	public:		Aa() { }};int main() {	Aa a;}