#include <iostream.h>
//-------------------------------------------------------------------
//     Matrix Multiplication
//      by Ching-Han Chen
//      2006-03-14
//--------------------------------------------------------------------
void main()
{
   float C[3]={2,3,4};
   float D[3]={ 1,
               -1,
                2};
   float product=0;
   int i;
   for(i=0;i<3;i++)
   {
	product=product+C[i]*D[i];
   }
   cout<<product<<endl;
}