#include <stdio.h> #include<math.h> int main(int argc, char *argv[]) { double a ,b, c; scanf("%lf %lf %lf",&a,&b,&c); double p,s; p=(a+b+c)/2; s=p*(p-a)*(p-b)*(p-c); printf("%.2f",sqrt(s)); return 0; } |
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