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