SPOJ Problem 22:Triangle From Centroid

#include<cstdio>
#include<cmath>
int t;
double x,y,z,a,s,d,r1,r2;
int main(){
    scanf("%d",&t);
    while(t--){
        scanf("%lf%lf%lf%lf",&a,&x,&y,&z);
        s=3*a*x/2;
        r1=pow(x*x*(y*y-z*z)/(y*y*z*z)*a/3,2.0);
        r2=a*a*x*x*x*(1/(x*x*x*x)-1/(y*y*y*y)-1/(z*z*z*z)+2/(y*y*z*z))/12-x;
        d=sqrt(r1+pow(r2,2.0));
        printf("%.3lf %.3lf\n",s,d);
    }
}