#include <iostream> #include <iomanip> #include <cmath> using namespace std; int main( ) { int a; int b; int c; cin >> a>> b>> c; double p=(a+b+c)/2.0; double d=p*(p-a)*(p-b)*(p-c); double s=sqrt(d); cout <<fixed <<setprecision (2) << s<< endl; return 0; } |
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