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

int main() {
   int a,b,c;
   char ch;
   cin >> a >> b >>c;
   double circle = a+b+c;
   double p = circle/2;
   double s = sqrt(p*(p-a)*(p-b)*(p-c)); 
   printf("circumference=%.2lf area=%.2lf",circle,s);
}