#include <stdio.h> #include <string.h> #include <math.h> #define N 100 int main() { double a, b, c; double p, s; scanf("%lf %lf %lf", &a, &b, &c); p = (a + b + c) / 2; s = sqrt(p * (p - a) * (p - b) * (p - c)); printf("%.2lf", s); } |
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