#include <iostream.h>

int main()
{
  int numin1, numin2, lines1, lines2;

  numin1 = 100;
  numin2 = 110;
  lines1 = numin1 * (numin1 - 1)/2;
  lines2 = numin2 * (numin2 - 1)/2;
  cout << "The number of initial lines is " << lines1 << ".\n";
  cout << "There are " << lines2-lines1
       << " additional lines needed.\n";

  return 0;
}