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