| 1 | 1 | class BowlingGame: |
| 2 | 2 | def __init__(self): |
| 3 | | pass |
| 4 | | |
| 3 | """ |
| 4 | Initialize a new bowling game. |
| 5 | """ |
| 6 | self.rolls = [] |
| 7 | self.current_roll = 0 |
| 8 | |
| 5 | 9 | def roll(self, pins): |
| 6 | | pass |
| 7 | | |
| 10 | """ |
| 11 | Record a roll in the game. |
| 12 | |
| 13 | Args: |
| 14 | pins (int): Number of pins knocked down in this roll. |
| 15 | |
| 16 | Raises: |
| 17 | ValueError: If the number of pins is invalid. |
| 18 | """ |
| 19 | # Edge Case: Check if game is already complete |
| 20 | if self._is_game_complete(): |
| 21 | raise IndexError("Game is already complete") |
| 22 | |
| 23 | # Edge Case: Invalid fill ball after spare in 10th frame |
| 24 | if len(self.rolls) == 20 and self.rolls[18] + self.rolls[19] == 10 and self.rolls[18] != 10 and pins > 10: |
| 25 | raise ValueError("Fill ball cannot exceed 10 pins") |
| 26 | |
| 27 | # Edge Case: Invalid pin count (negative or more than 10) |
| 28 | if pins < 0 or pins > 10: |
| 29 | raise ValueError("Pins must be between 0 and 10") |
| 30 | |
| 31 | # Edge Case: Second roll in a frame exceeds 10 pins |
| 32 | if len(self.rolls) % 2 == 1 and not self._is_tenth_frame(): |
| 33 | # Only check if previous roll was not a strike |
| 34 | if self.rolls[-1] != 10 and self.rolls[-1] + pins > 10: |
| 35 | raise ValueError("Cannot knock down more than 10 pins in a frame") |
| 36 | |
| 37 | # Edge Case: Invalid fill ball after spare in 10th frame |
| 38 | if len(self.rolls) == 20 and self.rolls[18] + self.rolls[19] == 10 and self.rolls[18] != 10 and pins > 10: |
| 39 | raise ValueError("Fill ball cannot exceed 10 pins") |
| 40 | |
| 41 | # Edge Case: Invalid third roll in 10th frame |
| 42 | if len(self.rolls) == 20: |
| 43 | # If first two rolls in 10th frame are not a strike or spare |
| 44 | if self.rolls[18] + self.rolls[19] < 10: |
| 45 | raise ValueError("Cannot roll after game is over") |
| 46 | # If there was a strike in 10th frame and second roll is not valid |
| 47 | if self.rolls[18] == 10 and self.rolls[19] < 10 and self.rolls[19] + pins > 10: |
| 48 | raise ValueError("Invalid fill ball") |
| 49 | # If there was a strike in 10th frame and second roll is also a strike |
| 50 | # Third roll can't exceed 10 |
| 51 | if self.rolls[18] == 10 and self.rolls[19] == 10 and pins > 10: |
| 52 | raise ValueError("Invalid fill ball") |
| 53 | |
| 54 | self.rolls.append(pins) |
| 55 | |
| 8 | 56 | def score(self): |
| 9 | | pass |
| 57 | """ |
| 58 | Calculate the total score for the game. |
| 59 | |
| 60 | Returns: |
| 61 | int: The total score of the game. |
| 62 | |
| 63 | Raises: |
| 64 | ValueError: If the game is not yet complete. |
| 65 | """ |
| 66 | # Edge Case: Game not complete (not enough rolls) |
| 67 | if len(self.rolls) < 12: # Minimum rolls for a game with no strikes/spares |
| 68 | # Check if we have 10 frames worth of rolls |
| 69 | frame_count = 0 |
| 70 | roll_index = 0 |
| 71 | while roll_index < len(self.rolls) and frame_count < 10: |
| 72 | if self._is_strike_at(roll_index): |
| 73 | frame_count += 1 |
| 74 | roll_index += 1 |
| 75 | else: |
| 76 | if roll_index + 1 < len(self.rolls): |
| 77 | frame_count += 1 |
| 78 | roll_index += 2 |
| 79 | else: |
| 80 | break |
| 81 | |
| 82 | if frame_count < 10: |
| 83 | raise IndexError("Game is not yet complete") |
| 84 | |
| 85 | # Edge Case: Incomplete 10th frame (19 rolls but spare needs fill ball) |
| 86 | # Check if we actually have 10 complete frames |
| 87 | frame_count = 0 |
| 88 | roll_index = 0 |
| 89 | while roll_index < len(self.rolls) and frame_count < 10: |
| 90 | if self._is_strike_at(roll_index): |
| 91 | frame_count += 1 |
| 92 | roll_index += 1 |
| 93 | else: |
| 94 | if roll_index + 1 < len(self.rolls): |
| 95 | frame_count += 1 |
| 96 | roll_index += 2 |
| 97 | else: |
| 98 | break |
| 99 | |
| 100 | if len(self.rolls) == 19 and frame_count < 10: |
| 101 | raise IndexError("Score cannot be taken until the end of the game") |
| 102 | |
| 103 | if len(self.rolls) == 20: |
| 104 | # If 10th frame is open (no need for 21st roll) |
| 105 | if self.rolls[18] + self.rolls[19] < 10: |
| 106 | pass # Game is complete |
| 107 | # If 10th frame is spare (need 21st roll) |
| 108 | elif self.rolls[18] + self.rolls[19] == 10: |
| 109 | raise ValueError("Score cannot be taken until the end of the game") |
| 110 | # If 10th frame first roll is strike (need to check second roll) |
| 111 | elif self.rolls[18] == 10: |
| 112 | if self.rolls[19] < 10: |
| 113 | pass # Game is complete (e.g., 10, 5, 3) |
| 114 | elif self.rolls[19] == 10: |
| 115 | raise ValueError("Score cannot be taken until the end of the game") # Need 21st roll |
| 116 | |
| 117 | if len(self.rolls) == 21: |
| 118 | # Edge Case: Invalid fill balls |
| 119 | # If 10th frame is spare, 21st roll can be 0-10 |
| 120 | if self.rolls[18] + self.rolls[19] == 10 and self.rolls[18] != 10: |
| 121 | if self.rolls[20] < 0 or self.rolls[20] > 10: |
| 122 | raise ValueError("invalid fill balls") |
| 123 | # If 10th frame is strike followed by non-strike |
| 124 | elif self.rolls[18] == 10 and self.rolls[19] < 10: |
| 125 | if self.rolls[20] < 0 or self.rolls[19] + self.rolls[20] > 10: |
| 126 | raise ValueError("invalid fill balls") |
| 127 | # If 10th frame is two strikes |
| 128 | elif self.rolls[18] == 10 and self.rolls[19] == 10: |
| 129 | if self.rolls[20] < 0 or self.rolls[20] > 10: |
| 130 | raise ValueError("invalid fill balls") |
| 131 | |
| 132 | score = 0 |
| 133 | roll_index = 0 |
| 134 | |
| 135 | for frame in range(10): |
| 136 | if self._is_strike_at(roll_index): # Strike |
| 137 | score += 10 + self._strike_bonus(roll_index) |
| 138 | roll_index += 1 |
| 139 | elif self._is_spare_at(roll_index): # Spare |
| 140 | score += 10 + self._spare_bonus(roll_index) |
| 141 | roll_index += 2 |
| 142 | else: # Open frame |
| 143 | score += self.rolls[roll_index] + self.rolls[roll_index + 1] |
| 144 | roll_index += 2 |
| 145 | |
| 146 | return score |
| 147 | |
| 148 | def _is_strike_at(self, roll_index): |
| 149 | """ |
| 150 | Check if a roll is a strike. |
| 151 | |
| 152 | Args: |
| 153 | roll_index (int): Index of the roll to check. |
| 154 | |
| 155 | Returns: |
| 156 | bool: True if the roll is a strike, False otherwise. |
| 157 | """ |
| 158 | return self.rolls[roll_index] == 10 |
| 159 | |
| 160 | def _is_spare_at(self, roll_index): |
| 161 | """ |
| 162 | Check if a frame is a spare. |
| 163 | |
| 164 | Args: |
| 165 | roll_index (int): Index of the first roll in the frame. |
| 166 | |
| 167 | Returns: |
| 168 | bool: True if the frame is a spare, False otherwise. |
| 169 | """ |
| 170 | return self.rolls[roll_index] + self.rolls[roll_index + 1] == 10 |
| 171 | |
| 172 | def _strike_bonus(self, roll_index): |
| 173 | """ |
| 174 | Calculate the bonus for a strike. |
| 175 | |
| 176 | Args: |
| 177 | roll_index (int): Index of the strike roll. |
| 178 | |
| 179 | Returns: |
| 180 | int: The bonus points for the strike. |
| 181 | """ |
| 182 | # Edge Case: Not enough rolls after strike to calculate bonus |
| 183 | if roll_index + 2 >= len(self.rolls): |
| 184 | return 0 |
| 185 | return self.rolls[roll_index + 1] + self.rolls[roll_index + 2] |
| 186 | |
| 187 | def _spare_bonus(self, roll_index): |
| 188 | """ |
| 189 | Calculate the bonus for a spare. |
| 190 | |
| 191 | Args: |
| 192 | roll_index (int): Index of the first roll in the spare frame. |
| 193 | |
| 194 | Returns: |
| 195 | int: The bonus points for the spare. |
| 196 | """ |
| 197 | # Edge Case: Not enough rolls after spare to calculate bonus |
| 198 | if roll_index + 2 >= len(self.rolls): |
| 199 | return 0 |
| 200 | return self.rolls[roll_index + 2] |
| 201 | |
| 202 | def _is_game_complete(self): |
| 203 | """ |
| 204 | Check if the game is complete. |
| 205 | |
| 206 | Returns: |
| 207 | bool: True if the game is complete, False otherwise. |
| 208 | """ |
| 209 | if len(self.rolls) < 10: |
| 210 | return False |
| 211 | |
| 212 | # Count complete frames |
| 213 | frame_count = 0 |
| 214 | roll_index = 0 |
| 215 | while roll_index < len(self.rolls) and frame_count < 10: |
| 216 | if self._is_strike_at(roll_index): |
| 217 | frame_count += 1 |
| 218 | roll_index += 1 |
| 219 | else: |
| 220 | if roll_index + 1 < len(self.rolls): |
| 221 | frame_count += 1 |
| 222 | roll_index += 2 |
| 223 | else: |
| 224 | break |
| 225 | |
| 226 | # If we don't have 10 complete frames, game is not complete |
| 227 | if frame_count < 10: |
| 228 | return False |
| 229 | |
| 230 | # Find the start of the 10th frame |
| 231 | tenth_frame_start = 0 |
| 232 | temp_frame_count = 0 |
| 233 | temp_roll_index = 0 |
| 234 | while temp_roll_index < len(self.rolls) and temp_frame_count < 9: |
| 235 | if self._is_strike_at(temp_roll_index): |
| 236 | temp_roll_index += 1 |
| 237 | else: |
| 238 | temp_roll_index += 2 |
| 239 | temp_frame_count += 1 |
| 240 | tenth_frame_start = temp_roll_index |
| 241 | |
| 242 | # Check 10th frame status |
| 243 | if tenth_frame_start >= len(self.rolls): |
| 244 | # No 10th frame yet (shouldn't happen if frame_count == 10) |
| 245 | return False |
| 246 | |
| 247 | rolls_in_tenth = len(self.rolls) - tenth_frame_start |
| 248 | |
| 249 | if self._is_strike_at(tenth_frame_start): |
| 250 | # 10th frame is a strike |
| 251 | return rolls_in_tenth >= 3 |
| 252 | else: |
| 253 | # 10th frame is open or spare |
| 254 | if tenth_frame_start + 1 >= len(self.rolls): |
| 255 | return False |
| 256 | |
| 257 | frame_total = self.rolls[tenth_frame_start] + self.rolls[tenth_frame_start + 1] |
| 258 | if frame_total == 10: |
| 259 | # Spare in 10th frame |
| 260 | return rolls_in_tenth >= 3 |
| 261 | else: |
| 262 | # Open frame in 10th frame |
| 263 | return rolls_in_tenth >= 2 |
| 264 | |
| 265 | def _is_tenth_frame(self): |
| 266 | """ |
| 267 | Check if we are currently in the tenth frame. |
| 268 | |
| 269 | Returns: |
| 270 | bool: True if we are in the tenth frame, False otherwise. |
| 271 | """ |
| 272 | # Count completed frames |
| 273 | frame_count = 0 |
| 274 | roll_index = 0 |
| 275 | |
| 276 | while roll_index < len(self.rolls) and frame_count < 9: |
| 277 | if self._is_strike_at(roll_index): |
| 278 | roll_index += 1 |
| 279 | else: |
| 280 | roll_index += 2 |
| 281 | frame_count += 1 |
| 282 | |
| 283 | # If we've completed 9 frames, we're in the 10th |
| 284 | return frame_count == 9 |
| 285 | |
| 286 | # Handled Edge Cases: Invalid pin count, game already over, second roll exceeding 10 pins, invalid fill balls, incomplete game, invalid fill balls in scoring |
| 287 | # Handled Edge Cases: Invalid pin count, game already over, second roll exceeding 10 pins, invalid fill balls in 10th frame, invalid third roll in 10th frame |
| 288 | # Handled Edge Cases: Game not complete, incomplete 10th frame, invalid fill balls |
| 289 | # Handled Edge Cases: Not enough rolls after strike to calculate bonus |
| 290 | # Handled Edge Cases: Not enough rolls after spare to calculate bonus |