View Code of Problem 24

#include<stdio.h>
#include<math.h>
int main(){
	int a, b, c;
	while(~scanf("%d%d%d",&a,&b,&c)){
		float s = sqrt((a + b + c) * (a + b - c) * (a + c - b) * (b + c - a)) * 0.25;
		printf("%.2f\n",s);
	}
	return 0;
}