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