#include <iostream>
using namespace std;

int main()
{
	double a(0);
	cout << "lecture a : ";
	cin  >> a ;
	cout << a       << endl ;
	
	int b(0);
	cout << "lecture b : "; 
	cin  >> b ;
	cout << b       << endl ;

	double c(0);
	cout << "lecture c : ";
	cin  >> c ;
	cout << c       << endl ;

	return 0;
}