#include<iostream.h>
#include<stdio.h>
int main(void)
{
	double pole,a,h;
	cout<<"podaj a: ";
	cin>>a;
	cout<<"podaj h: ";
	cin>>h;
	pole=0.5*a*h;
	cout<<"Pole\ntrojkata wynosi";
	cout<<"="<<pole<<endl;
	getchar;
	return 0;
}