| 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 pins is negative or greater than 10 |
| 18 | IndexError: If trying to roll after the game is over |
| 19 | """ |
| 20 | # Edge Case: Invalid number of pins (negative or more than 10) |
| 21 | if pins < 0 or pins > 10: |
| 22 | raise ValueError("invalid pin count") |
| 23 | |
| 24 | # Edge Case: Trying to roll after game is over |
| 25 | if self.is_game_over(): |
| 26 | raise ValueError("game already ended") |
| 27 | |
| 28 | # Edge Case: In a frame, cannot knock down more pins than remaining |
| 29 | # We need to determine if this is the second roll of a frame and validate accordingly |
| 30 | if len(self.rolls) > 0: |
| 31 | # Count completed frames to determine if we're in a new frame |
| 32 | completed_frames = 0 |
| 33 | i = 0 |
| 34 | while i < len(self.rolls): |
| 35 | # If this is a strike (first roll of frame is 10) |
| 36 | if self.rolls[i] == 10: |
| 37 | completed_frames += 1 |
| 38 | i += 1 |
| 39 | else: |
| 40 | # Regular frame - need two rolls |
| 41 | if i + 1 < len(self.rolls): |
| 42 | completed_frames += 1 |
| 43 | i += 2 |
| 44 | else: |
| 45 | # This is the second roll of current frame |
| 46 | if self.rolls[i] + pins > 10: |
| 47 | raise ValueError("invalid pin count") |
| 48 | break |
| 49 | |
| 50 | self.rolls.append(pins) |
| 51 | |
| 8 | 52 | def score(self): |
| 9 | | pass |
| 53 | """ |
| 54 | Calculate the total score for the game. |
| 55 | |
| 56 | Returns: |
| 57 | int: The total score for the game |
| 58 | |
| 59 | Raises: |
| 60 | IndexError: If the game is not yet complete |
| 61 | """ |
| 62 | # Edge Case: Trying to score before game is complete |
| 63 | if not self.is_game_over(): |
| 64 | raise ValueError("game not yet ended") |
| 65 | |
| 66 | score = 0 |
| 67 | roll_index = 0 |
| 68 | |
| 69 | for frame in range(10): |
| 70 | # Edge Case: Strike (first roll of frame knocks down all 10 pins) |
| 71 | if self.is_strike(roll_index): |
| 72 | score += 10 + self.strike_bonus(roll_index) |
| 73 | roll_index += 1 |
| 74 | # Edge Case: Spare (both rolls of frame knock down all 10 pins) |
| 75 | elif self.is_spare(roll_index): |
| 76 | score += 10 + self.spare_bonus(roll_index) |
| 77 | roll_index += 2 |
| 78 | # Edge Case: Open frame (less than 10 pins knocked down in frame) |
| 79 | else: |
| 80 | score += self.sum_of_balls_in_frame(roll_index) |
| 81 | roll_index += 2 |
| 82 | |
| 83 | return score |
| 84 | |
| 85 | def is_game_over(self): |
| 86 | """ |
| 87 | Check if the game is over. |
| 88 | |
| 89 | Returns: |
| 90 | bool: True if the game is over, False otherwise |
| 91 | """ |
| 92 | # Count completed frames |
| 93 | frame_count = 0 |
| 94 | roll_index = 0 |
| 95 | |
| 96 | while roll_index < len(self.rolls) and frame_count < 10: |
| 97 | if roll_index < len(self.rolls) and self.rolls[roll_index] == 10: |
| 98 | # Strike - one roll frame |
| 99 | frame_count += 1 |
| 100 | roll_index += 1 |
| 101 | else: |
| 102 | # Regular frame - need two rolls |
| 103 | if roll_index + 1 < len(self.rolls): |
| 104 | frame_count += 1 |
| 105 | roll_index += 2 |
| 106 | else: |
| 107 | # Incomplete frame |
| 108 | break |
| 109 | |
| 110 | # If we haven't completed 10 frames, game is not over |
| 111 | if frame_count < 10: |
| 112 | return False |
| 113 | |
| 114 | # If we have exactly 10 frames completed |
| 115 | if frame_count == 10: |
| 116 | # Need to check if the 10th frame needs bonus balls |
| 117 | # Find where the 10th frame starts |
| 118 | temp_frame_count = 0 |
| 119 | tenth_frame_start = 0 |
| 120 | i = 0 |
| 121 | |
| 122 | while i < len(self.rolls) and temp_frame_count < 10: |
| 123 | if self.rolls[i] == 10: |
| 124 | # Strike frame |
| 125 | temp_frame_count += 1 |
| 126 | if temp_frame_count == 10: |
| 127 | tenth_frame_start = i |
| 128 | break |
| 129 | i += 1 |
| 130 | else: |
| 131 | # Regular frame |
| 132 | temp_frame_count += 1 |
| 133 | if temp_frame_count == 10: |
| 134 | tenth_frame_start = i |
| 135 | break |
| 136 | if i + 1 < len(self.rolls): |
| 137 | i += 2 |
| 138 | else: |
| 139 | # Incomplete 10th frame |
| 140 | return False |
| 141 | |
| 142 | # Now check the 10th frame |
| 143 | if tenth_frame_start < len(self.rolls): |
| 144 | # If 10th frame is a strike |
| 145 | if self.rolls[tenth_frame_start] == 10: |
| 146 | # Need 2 bonus rolls |
| 147 | bonus_rolls_count = 0 |
| 148 | for i in range(tenth_frame_start + 1, len(self.rolls)): |
| 149 | bonus_rolls_count += 1 |
| 150 | return bonus_rolls_count >= 2 |
| 151 | # If 10th frame is a spare |
| 152 | elif tenth_frame_start + 1 < len(self.rolls) and self.rolls[tenth_frame_start] + self.rolls[tenth_frame_start + 1] == 10: |
| 153 | # Need 1 bonus roll |
| 154 | bonus_rolls_count = 0 |
| 155 | for i in range(tenth_frame_start + 2, len(self.rolls)): |
| 156 | bonus_rolls_count += 1 |
| 157 | return bonus_rolls_count >= 1 |
| 158 | # If 10th frame is open |
| 159 | else: |
| 160 | return True |
| 161 | |
| 162 | return True |
| 163 | |
| 164 | def is_strike(self, roll_index): |
| 165 | """ |
| 166 | Check if a roll is a strike. |
| 167 | |
| 168 | Args: |
| 169 | roll_index (int): Index of the roll to check |
| 170 | |
| 171 | Returns: |
| 172 | bool: True if the roll is a strike, False otherwise |
| 173 | """ |
| 174 | return self.rolls[roll_index] == 10 |
| 175 | |
| 176 | def is_spare(self, roll_index): |
| 177 | """ |
| 178 | Check if a frame is a spare. |
| 179 | |
| 180 | Args: |
| 181 | roll_index (int): Index of the first roll of the frame |
| 182 | |
| 183 | Returns: |
| 184 | bool: True if the frame is a spare, False otherwise |
| 185 | """ |
| 186 | return self.rolls[roll_index] + self.rolls[roll_index + 1] == 10 |
| 187 | |
| 188 | def sum_of_balls_in_frame(self, roll_index): |
| 189 | """ |
| 190 | Calculate the sum of pins knocked down in a frame. |
| 191 | |
| 192 | Args: |
| 193 | roll_index (int): Index of the first roll of the frame |
| 194 | |
| 195 | Returns: |
| 196 | int: Sum of pins knocked down in the frame |
| 197 | """ |
| 198 | return self.rolls[roll_index] + self.rolls[roll_index + 1] |
| 199 | |
| 200 | def spare_bonus(self, roll_index): |
| 201 | """ |
| 202 | Calculate the bonus for a spare. |
| 203 | |
| 204 | Args: |
| 205 | roll_index (int): Index of the first roll of the spare frame |
| 206 | |
| 207 | Returns: |
| 208 | int: The bonus points for the spare |
| 209 | """ |
| 210 | return self.rolls[roll_index + 2] |
| 211 | |
| 212 | def strike_bonus(self, roll_index): |
| 213 | """ |
| 214 | Calculate the bonus for a strike. |
| 215 | |
| 216 | Args: |
| 217 | roll_index (int): Index of the strike roll |
| 218 | |
| 219 | Returns: |
| 220 | int: The bonus points for the strike |
| 221 | """ |
| 222 | return self.rolls[roll_index + 1] + self.rolls[roll_index + 2] |
| 223 | |
| 224 | # Handled Edge Cases: Invalid pins count, rolling after game over, invalid fill balls, scoring before game completion, strike frames, spare frames, open frames |