field turn: int field his_hist: int [] field my_hist: int [] field defect: int field r: int def start() -> void : if (turn == 0) : defect = 0 r = 0 elseif turn >= 19: defect = 1 elseif r > 0: r = r - 1 defect = 1 elseif his_hist[turn-1]: r = 2 defect = 0 else : defect = 0