#include <stdio.h>
#include <math.h>
int main()
{
    int a,b,c;
    scanf("%d %d %d",&a,&b,&c);
    float p=(a+b+c)/2.0;
    float s=sqrt(p*(p-a)*(p-b)*(p-c));
    printf("circumference=%.2f area=%.2f",2*p,s);
    return 0;
}