#include<stdio.h> #include<math.h> void fun(){ } int main(){ double a,b,c; double s,p; while(scanf("%lf %lf %lf",&a,&b,&c)!=EOF){ p=(a+b+c)/2; s=sqrt(p*(p-a)*(p-b)*(p-c)); printf("%1.2lf\n",s); } return 0; } |
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