#include <iostream>
using namespace std;

class c1
{
	public:
	class c2
	{
		protected:
			static int func(int i);
	};
	
	public:
		int a1;
	private:
		int a2;
};

int c1::c2::func(int i)
{
	c1::a2= 1;
	printf("func");	
	return 0;
}

int main() {
	
//c1::c2::func(0);
	return 0;
}