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