title: Pizza Cut Problem Circle Division Lines
signature: def pizzaCutProblemCircleDivisionLines(n: Int) = {
source_py: def pizza_cut_problem_circle_division_lines(n):
      return int((1 + ((n * (n + 1)) / 2)))
source_cpp: int pizza_cut_problem_circle_division_lines(int n) {
    return 1 + n * ( n + 1 ) / 2;
  }