#include
#include
#define S(a,b,c) ((a+b+c)/2)
#define AREA(a,b,c) sqrt(S(a,b,c)*(S(a,b,c) - a)*(S(a,b,c) - b)*(S(a,b,c) - c))
int main()
{
double a,b,c;
while (1)
{
cout a >> b >> c;
cout
#include
#include
#define S(a,b,c) ((a+b+c)/2)
#define AREA(a,b,c) sqrt(S(a,b,c)*(S(a,b,c) - a)*(S(a,b,c) - b)*(S(a,b,c) - c))
int main()
{
double a,b,c;
while (1)
{
cout a >> b >> c;
cout