#include <iostream>
#include <fstream>

using namespace std;

int main()
{ fstream fi;
  fi.open("/home/www/class/een318/mystery.dat", ios::in | ios::binary);
  if (fi.fail())
  { cerr << "not open\n";
    exit(1); }
  short int a[600];
  while (true)
  { fi.read((char *)a, sizeof(a));
    if (fi.gcount() <= 0)
      break;
    for (int i = 0; i < 600; i += 10)
      if (a[i] > 0)
        cout << "x";
      else if (a[i] == -500)
        cout << ".";
      else
        cout << "@";
    cout << "\n";
    fi.seekg(9 * sizeof(a), ios::cur); }
  fi.close(); }