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