| 1 | 1 | class BowlingGame: |
| 2 | 2 | def __init__(self): |
| 3 | | pass |
| 4 | | |
| 3 | """ |
| 4 | Initialize a new bowling game. |
| 5 | """ |
| 6 | self.rolls = [] |
| 7 | |
| 5 | 8 | def roll(self, pins): |
| 6 | | pass |
| 7 | | |
| 9 | """ |
| 10 | Record a roll in the game. |
| 11 | |
| 12 | Args: |
| 13 | pins (int): Number of pins knocked down in this roll. |
| 14 | |
| 15 | Raises: |
| 16 | ValueError: If the number of pins is invalid. |
| 17 | IndexError: If the game has already ended. |
| 18 | """ |
| 19 | # Validate pin count |
| 20 | if pins < 0 or pins > 10: |
| 21 | raise ValueError("Pins must be between 0 and 10") |
| 22 | |
| 23 | # Check if game has already ended |
| 24 | if self.is_game_complete(): |
| 25 | raise IndexError("Game has already ended") |
| 26 | |
| 27 | # Validate frame pin limits |
| 28 | if len(self.rolls) > 0: |
| 29 | frame_index = self.get_current_frame_index() |
| 30 | |
| 31 | if frame_index < 9: # Regular frames (0-8) |
| 32 | # If this is the second roll of a frame |
| 33 | if len(self.rolls) % 2 == 1 and not self.is_strike(len(self.rolls) - 1): |
| 34 | if self.rolls[-1] + pins > 10: |
| 35 | raise ValueError("Cannot knock down more pins than available") |
| 36 | else: # Tenth frame |
| 37 | self.validate_tenth_frame_roll(pins) |
| 38 | |
| 39 | self.rolls.append(pins) |
| 40 | |
| 41 | def validate_tenth_frame_roll(self, pins): |
| 42 | """ |
| 43 | Validate a roll in the tenth frame. |
| 44 | |
| 45 | Args: |
| 46 | pins (int): Number of pins knocked down. |
| 47 | |
| 48 | Raises: |
| 49 | ValueError: If the roll is invalid for the tenth frame. |
| 50 | """ |
| 51 | # Get the start index of the tenth frame |
| 52 | roll_index = self.get_tenth_frame_start_index() |
| 53 | tenth_frame_rolls = len(self.rolls) - roll_index |
| 54 | |
| 55 | if tenth_frame_rolls == 1: # Second roll of tenth frame |
| 56 | first_roll = self.rolls[roll_index] |
| 57 | if first_roll == 10: # First roll was a strike |
| 58 | # Second roll can be anything 0-10 |
| 59 | pass |
| 60 | elif first_roll + pins > 10: # First roll wasn't a strike |
| 61 | raise ValueError("Cannot knock down more pins than available") |
| 62 | elif tenth_frame_rolls == 2: # Third roll of tenth frame |
| 63 | first_roll = self.rolls[roll_index] |
| 64 | second_roll = self.rolls[roll_index + 1] |
| 65 | |
| 66 | if first_roll == 10: # First roll was a strike |
| 67 | if second_roll == 10: # Second roll was also a strike |
| 68 | # Third roll can be anything 0-10 |
| 69 | pass |
| 70 | else: # Second roll wasn't a strike |
| 71 | if second_roll + pins > 10: |
| 72 | raise ValueError("Cannot knock down more pins than available") |
| 73 | elif first_roll + second_roll == 10: # First two rolls were a spare |
| 74 | # Third roll can be anything 0-10 |
| 75 | pass |
| 76 | # If first two rolls were an open frame, there shouldn't be a third roll |
| 77 | # This case should be caught by is_game_complete() |
| 78 | |
| 79 | def get_current_frame_index(self): |
| 80 | """ |
| 81 | Get the current frame index (0-9). |
| 82 | |
| 83 | Returns: |
| 84 | int: Current frame index. |
| 85 | """ |
| 86 | roll_index = 0 |
| 87 | frame_index = 0 |
| 88 | |
| 89 | while frame_index < 9 and roll_index < len(self.rolls): |
| 90 | if self.is_strike(roll_index): |
| 91 | roll_index += 1 |
| 92 | else: |
| 93 | roll_index += 2 |
| 94 | frame_index += 1 |
| 95 | |
| 96 | return frame_index |
| 97 | |
| 98 | def get_tenth_frame_start_index(self): |
| 99 | """ |
| 100 | Get the start index of the tenth frame. |
| 101 | |
| 102 | Returns: |
| 103 | int: Start index of the tenth frame. |
| 104 | """ |
| 105 | roll_index = 0 |
| 106 | frame_index = 0 |
| 107 | |
| 108 | while frame_index < 9 and roll_index < len(self.rolls): |
| 109 | if self.is_strike(roll_index): |
| 110 | roll_index += 1 |
| 111 | else: |
| 112 | roll_index += 2 |
| 113 | frame_index += 1 |
| 114 | |
| 115 | return roll_index |
| 116 | |
| 8 | 117 | def score(self): |
| 9 | | pass |
| 118 | """ |
| 119 | Calculate the total score for the game. |
| 120 | |
| 121 | Returns: |
| 122 | int: The total score of the game. |
| 123 | |
| 124 | Raises: |
| 125 | IndexError: If the game is not yet complete. |
| 126 | """ |
| 127 | # Edge Case: Game not yet complete |
| 128 | if not self.is_game_complete(): |
| 129 | raise IndexError("Game is not yet complete") |
| 130 | |
| 131 | score = 0 |
| 132 | roll_index = 0 |
| 133 | |
| 134 | for frame in range(10): |
| 135 | # Edge Case: Strike in frames 0-8 |
| 136 | if self.is_strike(roll_index) and frame < 9: |
| 137 | score += 10 + self.strike_bonus(roll_index) |
| 138 | roll_index += 1 |
| 139 | # Edge Case: Spare in frames 0-8 |
| 140 | elif self.is_spare(roll_index) and frame < 9: |
| 141 | score += 10 + self.spare_bonus(roll_index) |
| 142 | roll_index += 2 |
| 143 | # Edge Case: Open frame in frames 0-8 |
| 144 | elif frame < 9: |
| 145 | score += self.sum_of_balls_in_frame(roll_index) |
| 146 | roll_index += 2 |
| 147 | # Edge Case: Tenth frame handling |
| 148 | else: # frame == 9 (10th frame) |
| 149 | # For the 10th frame, we sum all the rolls in that frame |
| 150 | # This includes any bonus rolls |
| 151 | tenth_frame_rolls = 0 |
| 152 | remaining_rolls = len(self.rolls) - roll_index |
| 153 | |
| 154 | # Sum all remaining rolls (which are the 10th frame rolls including bonuses) |
| 155 | for i in range(remaining_rolls): |
| 156 | tenth_frame_rolls += self.rolls[roll_index + i] |
| 157 | |
| 158 | score += tenth_frame_rolls |
| 159 | roll_index += remaining_rolls |
| 160 | |
| 161 | return score |
| 162 | |
| 163 | def is_game_complete(self): |
| 164 | """ |
| 165 | Check if the game is complete (10 frames have been played). |
| 166 | |
| 167 | Returns: |
| 168 | bool: True if the game is complete, False otherwise. |
| 169 | """ |
| 170 | # Need at least 12 rolls for a game with all strikes except last frame |
| 171 | # and at least 20 rolls for a game with no strikes or spares |
| 172 | if len(self.rolls) < 12: |
| 173 | return False |
| 174 | |
| 175 | # Count frames to determine if we've completed 10 frames |
| 176 | roll_index = 0 |
| 177 | frames_completed = 0 |
| 178 | |
| 179 | # Process first 9 frames |
| 180 | while frames_completed < 9 and roll_index < len(self.rolls): |
| 181 | if roll_index < len(self.rolls) and self.is_strike(roll_index): |
| 182 | roll_index += 1 |
| 183 | else: |
| 184 | if roll_index + 1 < len(self.rolls): |
| 185 | roll_index += 2 |
| 186 | else: |
| 187 | # Not enough rolls to complete this frame |
| 188 | return False |
| 189 | frames_completed += 1 |
| 190 | |
| 191 | # If we haven't completed 9 frames, game is not complete |
| 192 | if frames_completed < 9: |
| 193 | return False |
| 194 | |
| 195 | # Process 10th frame |
| 196 | if roll_index >= len(self.rolls): |
| 197 | return False |
| 198 | |
| 199 | # Check 10th frame scenarios |
| 200 | if roll_index < len(self.rolls) and self.is_strike(roll_index): # First roll is strike |
| 201 | # Need two more rolls for strike in 10th frame |
| 202 | return roll_index + 2 < len(self.rolls) |
| 203 | else: |
| 204 | if roll_index + 1 >= len(self.rolls): |
| 205 | return False |
| 206 | frame_score = self.rolls[roll_index] + self.rolls[roll_index + 1] |
| 207 | if frame_score == 10: # Spare in 10th frame |
| 208 | # Need one more roll for spare in 10th frame |
| 209 | return roll_index + 2 < len(self.rolls) |
| 210 | else: # Open frame |
| 211 | return roll_index + 1 < len(self.rolls) |
| 212 | |
| 213 | def is_strike(self, roll_index): |
| 214 | """ |
| 215 | Check if a roll is a strike. |
| 216 | |
| 217 | Args: |
| 218 | roll_index (int): Index of the roll to check. |
| 219 | |
| 220 | Returns: |
| 221 | bool: True if the roll is a strike, False otherwise. |
| 222 | """ |
| 223 | return self.rolls[roll_index] == 10 |
| 224 | |
| 225 | def is_spare(self, roll_index): |
| 226 | """ |
| 227 | Check if a frame is a spare. |
| 228 | |
| 229 | Args: |
| 230 | roll_index (int): Index of the first roll in the frame. |
| 231 | |
| 232 | Returns: |
| 233 | bool: True if the frame is a spare, False otherwise. |
| 234 | """ |
| 235 | return self.rolls[roll_index] + self.rolls[roll_index + 1] == 10 |
| 236 | |
| 237 | def strike_bonus(self, roll_index): |
| 238 | """ |
| 239 | Calculate the bonus for a strike. |
| 240 | |
| 241 | Args: |
| 242 | roll_index (int): Index of the strike roll. |
| 243 | |
| 244 | Returns: |
| 245 | int: The bonus points for the strike. |
| 246 | """ |
| 247 | return self.rolls[roll_index + 1] + self.rolls[roll_index + 2] |
| 248 | |
| 249 | def spare_bonus(self, roll_index): |
| 250 | """ |
| 251 | Calculate the bonus for a spare. |
| 252 | |
| 253 | Args: |
| 254 | roll_index (int): Index of the first roll in the spare frame. |
| 255 | |
| 256 | Returns: |
| 257 | int: The bonus points for the spare. |
| 258 | """ |
| 259 | return self.rolls[roll_index + 2] |
| 260 | |
| 261 | def sum_of_balls_in_frame(self, roll_index): |
| 262 | """ |
| 263 | Calculate the sum of pins knocked down in a frame. |
| 264 | |
| 265 | Args: |
| 266 | roll_index (int): Index of the first roll in the frame. |
| 267 | |
| 268 | Returns: |
| 269 | int: The sum of pins knocked down in the frame. |
| 270 | """ |
| 271 | return self.rolls[roll_index] + self.rolls[roll_index + 1] |
| 272 | |
| 273 | def is_tenth_frame(self): |
| 274 | """ |
| 275 | Check if we are currently in the tenth frame. |
| 276 | |
| 277 | Returns: |
| 278 | bool: True if we are in the tenth frame, False otherwise. |
| 279 | """ |
| 280 | # Count completed frames |
| 281 | roll_index = 0 |
| 282 | frames_completed = 0 |
| 283 | |
| 284 | while frames_completed < 9 and roll_index < len(self.rolls): |
| 285 | if roll_index < len(self.rolls) and self.is_strike(roll_index): |
| 286 | roll_index += 1 |
| 287 | else: |
| 288 | if roll_index + 1 < len(self.rolls): |
| 289 | roll_index += 2 |
| 290 | else: |
| 291 | break # Not enough rolls to complete this frame |
| 292 | frames_completed += 1 |
| 293 | |
| 294 | # If we've completed 9 frames, we're in the 10th frame |
| 295 | return frames_completed == 9 and roll_index < len(self.rolls) |
| 296 | |
| 297 | # Handled Edge Cases: Invalid pin count, game already completed, game not yet complete, strike in frames 0-8, spare in frames 0-8, open frame in frames 0-8, tenth frame handling |