/* */
#include <iostream> 
#include <cstdlib>
#include <cmath>
using namespace std;
int main(int argc, char *argv[])
{ int N;
  double A[100], x0, ameg, pval=0; 
  do {
  cout<<"N= ?"; 
  cin>>N; 
  } while (N<0);
  for (int i=0; i<=N; i++) {
    cout<<"A["<<i<<"]= ?"; 
    cin>>A[i];
   }  
  cout<<"x0= ?"; 
  cin>>x0;
  ameg=abs(A[0]);      
  for (int i=0; i<=N; i++) {
     if (abs(A[i])>ameg) ameg=A[i]; }
  cout <<"Max Abs is "<<ameg<<endl;         
  for (int i=0; i<=N; i++) {
     pval=pval+(ameg-A[i])*pow(x0,i); }  
  cout <<"Pval sto x0 is "<<pval<<endl;     
  system("PAUSE");
  return 0;
}