#include <stdio.h> #include <math.h> int main() { int a = 0; int b = 0; int c = 0; scanf("%d %d %d", &a, &b, &c); float len = a+b+c; float p = (a+b+c)/2.0; float area = sqrt(p*(p-a)*(p-b)*(p-c)); printf("circumference=%.2f area=%.2f\n", len, area); return 0; }