View Code of Problem 24

#include<cstdio>
#include<cmath>
using namespace std;
int main(){
	int a,b,c;
	double s;
	while(scanf("%d%d%d",&a,&b,&c)!=EOF){
		s=(a+b+c)/2.0;
		printf("%.2lf\n",sqrt(s*(s-a)*(s-b)*(s-c)));
	}
	return 0;
}