// p03_04.cpp: How many distinct integers are read? 

//   (Duplicates are not counted.)

#include <iostream>

using namespace std;



int main()

{  const int maxN = 20;

   // At most 20 distinct integers, with unlimited numbers of

   // duplicates.

   cout << "Enter integers, followed by a nonnumeric 

           "character:\n";

   int n=0, i, a[maxN], x;

   while (cin >> x)

   {  for (i=0; i<n; ++i) 

         if (x == a[i]) break;

      if (i == n)    

      {  if (n == maxN) 

         {  cout << "More than " << maxN 

                 << " distinct integers in input.\n";

            return 0;

         }

         a[n++] = x;

      }

   }

   cout << "Number of distinct integers: " << n 

        << endl;

   return 0;

}