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