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