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