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