#include <iostream.h>

float polynomial( float a[], float x, int n)
{
	int i;
	float value=a[n];
	for (i=n;i>0;i--)
		value=value*x +a[i-1];
	return value;
}

int main()
{
	float a[]={1,2,3};
	int n=2;
	float x=2.0;
	float y;
	y=polynomial(a,x,n);
	cout<<y<<endl;
	return 0;
}