#include <iostream.h>

main()
{
  int score, sum;

  sum = 0;
  cout << "Enter score (-1 to quit): ";
  cin >> score;

  while (score != -1) {
    sum += score;
    cout << "Enter score (-1 to quit): ";
    cin >> score;
  }

  cout << "Sum = " << sum << endl;

  return 0;
}