#include <fstream>

using namespace std;

int main() {
	fstream A("A.txt"), B("B.txt"), C("C.txt", std::fstream::out);
	float t1, t2, t3, inp;
	t1 = t2 = t3 = 0;
	while(A >> inp)
		if(inp > 0 && inp < 1)
			C << inp << endl;
	while(B >> inp) {
		t3 = t2;
		t2 = t1;
		t1 = inp;
		if(inp > 0 && inp < 1)
			C << inp << endl;
	}
	A.close();
	A.open("A.txt", std::fstream::in | std::fstream::app);
	A << endl << t3 << endl << t2 << endl << t1;
	A.close();
	B.close();
	C.close();
	return 0;
}