#include <stdio.h>
#include<math.h>
int main() {
  unsigned int a, b,c;
scanf("%d%d%d",&a,&b,&c);
float circumference=a+b+c;
float p=0.5*(a+b+c);
 float area = sqrt(p*(p-a)*(p-b)*(p-c));
printf("circumference=%.2f area=%.2f",circumference,area);
    return 0;
}