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