#include <stdio.h> int main() { int a = 0; int b = 0; int c = 0; scanf("%d %d %d", &a, &b, &c); float C = (float)(a + b + c); double p =C/2; double S = pow(p * (p - a) * (p - b) * (p - c), 0.5); printf("circumference=%.2f area=%.2f", C, S); return 0; }