View Code of Problem 24

#include<stdio.h>
#include<cstdlib>
#include<cmath>
#include<iostream>
#include<algorithm>
using namespace std;
typedef long long ll;
int main(){
      int a,b,c;
      while(scanf("%d%d%d",&a,&b,&c)==3){
      double p=(a+b+c)/2.0;
      double s=sqrt(p*(p-a)*(p-b)*(p-c));
      printf("%.2f\n", s);
	  }
	  return 0;
}