View Code of Problem 24

#include<iostream>
#include<map>
#include<cmath>
using namespace std;
int main(){
	double a,b,c;
	while(cin>>a>>b>>c){
		
		double p=((a+b+c))/2.0;
	//	double media=;
		double sum=sqrt(p*(p-a)*(p-b)*(p-c));
		printf("%.2lf\n",sum);
	}
}