#include <stdio.h> #include <string.h> #include <math.h> #define N 100000 int main() { int a,b,c; while(scanf("%d%d%d",&a,&b,&c)!=EOF) { float s,p; 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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