View Code of Problem 24

#include<cstdio>
#include<iostream>
#include<algorithm>
#include<cmath>
#include<cstring>
#include<vector>
#include<map>
#include<string>
#include<set>
using namespace std;
int main(){
    double 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));
		printf("%.2f\n",s);
    }
	return 0;
}