12.3456789

12.345679

12.34568

1.234568e+001

12.3457

#include<iostream> 
#include<cstdio> 
using namespace std;

int main()
{
	double x;
	scanf("%lf", &x);
	printf("%lf\n", x);
	printf("%.5lf\n", x);
	printf("%e\n", x);
	printf("%g", x);
	
	return 0;
}