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