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