#include <iostream>

using namespace std;

int square(int x) 
{return x*x;}

double square(double y)
{return y*y;}

void nothing1(int a, float b, char c, int *d)
{} // empty function body

char *nothing2(char a, int b, float *c, double *d)
{ return 0;}

int main()
{
    
	return 0;

}