#include <stdio.h> #include <iostream> #include <string.h> #include <string> #include <algorithm> #include <iomanip> #include<vector> #include<math.h> using namespace std; int main() { int a, b, c; while (cin >> a >> b >> c) { double p = (a + b + c) / 2.0; double s =sqrt( (p*(p - a)*(p - b)*(p - c))); cout << fixed << setprecision(2) << s<<endl; } } |
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