| 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 | """ |
| 18 | # Validate pin count |
| 19 | if pins < 0: |
| 20 | raise ValueError("Pins must be between 0 and 10") |
| 21 | if pins > 10: |
| 22 | raise ValueError("Pins must be between 0 and 10") |
| 23 | |
| 24 | # Check if game is already complete |
| 25 | if self.is_game_complete(): |
| 26 | raise ValueError("Game has ended") |
| 27 | |
| 28 | # Check if this roll is valid in the current frame context |
| 29 | if len(self.rolls) >= 1: |
| 30 | # Check if we're in a regular frame (not 10th frame) |
| 31 | if len(self.rolls) < 18: |
| 32 | # Check if this is the second roll of a frame |
| 33 | # We need to determine if the previous roll was the first roll of a new frame |
| 34 | frame_count = 0 |
| 35 | roll_index = 0 |
| 36 | |
| 37 | # Count complete frames |
| 38 | while frame_count < 9 and roll_index < len(self.rolls): |
| 39 | if self.rolls[roll_index] == 10: # Strike |
| 40 | roll_index += 1 |
| 41 | else: |
| 42 | if roll_index + 1 < len(self.rolls): |
| 43 | roll_index += 2 |
| 44 | else: |
| 45 | # This is the first roll of an incomplete frame |
| 46 | # Check if the sum with this roll would exceed 10 |
| 47 | if self.rolls[roll_index] + pins > 10: |
| 48 | raise ValueError("Cannot knock down more pins than remaining") |
| 49 | break |
| 50 | frame_count += 1 |
| 51 | else: |
| 52 | # We're in the 10th frame area, handle fill balls |
| 53 | # Count frames to determine if we're in fill balls |
| 54 | frame_count = 0 |
| 55 | roll_index = 0 |
| 56 | |
| 57 | # Count frames 1-9 |
| 58 | while frame_count < 9 and roll_index < len(self.rolls): |
| 59 | if self.rolls[roll_index] == 10: # Strike |
| 60 | roll_index += 1 |
| 61 | else: |
| 62 | roll_index += 2 |
| 63 | frame_count += 1 |
| 64 | |
| 65 | # Now check 10th frame |
| 66 | if roll_index < len(self.rolls): # We have rolls in 10th frame |
| 67 | if self.rolls[roll_index] == 10: # First roll was strike |
| 68 | if roll_index + 1 < len(self.rolls): # Second roll exists |
| 69 | # We're about to add the third roll (second fill ball) |
| 70 | # If second roll was not a strike, validate sum |
| 71 | if self.rolls[roll_index + 1] != 10: |
| 72 | if self.rolls[roll_index + 1] + pins > 10: |
| 73 | raise ValueError("Cannot knock down more pins than remaining") |
| 74 | # If second roll was a strike, no validation needed |
| 75 | else: |
| 76 | # This is second roll of 10th frame |
| 77 | # If first two rolls are strikes, third can be anything |
| 78 | pass |
| 79 | else: # First roll was not strike |
| 80 | if roll_index + 1 < len(self.rolls): # Second roll exists |
| 81 | # Check if it's a spare |
| 82 | if self.rolls[roll_index] + self.rolls[roll_index + 1] == 10: |
| 83 | # This is a fill ball, no validation needed except pin count |
| 84 | pass |
| 85 | else: |
| 86 | # This is second roll of open frame, no third roll should happen |
| 87 | pass |
| 88 | else: |
| 89 | # This is second roll of 10th frame |
| 90 | # Check if sum exceeds 10 |
| 91 | if self.rolls[roll_index] + pins > 10: |
| 92 | raise ValueError("Cannot knock down more pins than remaining") |
| 93 | |
| 94 | self.rolls.append(pins) |
| 95 | |
| 96 | def _get_current_frame_index(self): |
| 97 | """Get the current frame index (0-based) based on rolls.""" |
| 98 | # Count complete frames first |
| 99 | frame_index = 0 |
| 100 | roll_index = 0 |
| 101 | |
| 102 | # For frames 1-9 |
| 103 | while frame_index < 9 and roll_index < len(self.rolls): |
| 104 | if roll_index < len(self.rolls) and self.rolls[roll_index] == 10: # Strike |
| 105 | roll_index += 1 |
| 106 | else: |
| 107 | if roll_index + 1 < len(self.rolls): |
| 108 | roll_index += 2 |
| 109 | else: |
| 110 | break |
| 111 | frame_index += 1 |
| 112 | |
| 113 | return frame_index |
| 114 | |
| 115 | def is_game_complete(self): |
| 116 | """Check if the game is complete.""" |
| 117 | # Need at least 10 frames worth of rolls |
| 118 | if len(self.rolls) < 10: |
| 119 | return False |
| 120 | |
| 121 | # Count frames |
| 122 | frame_count = 0 |
| 123 | roll_index = 0 |
| 124 | |
| 125 | # Count frames 1-9 |
| 126 | while frame_count < 9 and roll_index < len(self.rolls): |
| 127 | if self.rolls[roll_index] == 10: # Strike |
| 128 | roll_index += 1 |
| 129 | else: |
| 130 | if roll_index + 1 >= len(self.rolls): |
| 131 | return False # Incomplete frame |
| 132 | roll_index += 2 |
| 133 | frame_count += 1 |
| 134 | |
| 135 | # If we haven't completed 9 frames, game is not complete |
| 136 | if frame_count < 9: |
| 137 | return False |
| 138 | |
| 139 | # Check 10th frame |
| 140 | if roll_index >= len(self.rolls): |
| 141 | return False # No rolls in 10th frame yet |
| 142 | |
| 143 | # 10th frame |
| 144 | if self.rolls[roll_index] == 10: # Strike in 10th frame |
| 145 | if roll_index + 1 >= len(self.rolls): |
| 146 | return False # Need first fill ball |
| 147 | if self.rolls[roll_index + 1] == 10: # Second strike |
| 148 | if roll_index + 2 >= len(self.rolls): |
| 149 | return False # Need second fill ball |
| 150 | return True # All rolls complete |
| 151 | else: # First strike, second is not strike |
| 152 | if roll_index + 2 >= len(self.rolls): |
| 153 | return False # Need second fill ball |
| 154 | return True # All rolls complete |
| 155 | else: # Not a strike in first roll of 10th frame |
| 156 | if roll_index + 1 >= len(self.rolls): |
| 157 | return False # Need second roll |
| 158 | if self.rolls[roll_index] + self.rolls[roll_index + 1] == 10: # Spare |
| 159 | if roll_index + 2 >= len(self.rolls): |
| 160 | return False # Need fill ball |
| 161 | return True # All rolls complete |
| 162 | else: # Open frame |
| 163 | return True # Frame complete |
| 164 | |
| 165 | return False |
| 166 | |
| 8 | 167 | def score(self): |
| 9 | | pass |
| 168 | """ |
| 169 | Calculate the total score for the game. |
| 170 | |
| 171 | Returns: |
| 172 | int: The total score of the game. |
| 173 | |
| 174 | Raises: |
| 175 | IndexError: If the game is not yet complete. |
| 176 | """ |
| 177 | # Check if game is complete |
| 178 | if not self.is_game_complete(): |
| 179 | raise IndexError("game not complete") |
| 180 | |
| 181 | total_score = 0 |
| 182 | roll_index = 0 |
| 183 | |
| 184 | for frame in range(10): |
| 185 | if frame < 9: # Frames 1-9 |
| 186 | if self.rolls[roll_index] == 10: # Strike |
| 187 | # Add bonus: next two rolls |
| 188 | bonus = 0 |
| 189 | if roll_index + 1 < len(self.rolls): |
| 190 | bonus += self.rolls[roll_index + 1] |
| 191 | if roll_index + 2 < len(self.rolls): |
| 192 | bonus += self.rolls[roll_index + 2] |
| 193 | total_score += 10 + bonus |
| 194 | roll_index += 1 |
| 195 | elif self.rolls[roll_index] + self.rolls[roll_index + 1] == 10: # Spare |
| 196 | # Add bonus: next roll |
| 197 | bonus = 0 |
| 198 | if roll_index + 2 < len(self.rolls): |
| 199 | bonus = self.rolls[roll_index + 2] |
| 200 | total_score += 10 + bonus |
| 201 | roll_index += 2 |
| 202 | else: # Open frame |
| 203 | total_score += self.rolls[roll_index] + self.rolls[roll_index + 1] |
| 204 | roll_index += 2 |
| 205 | else: # 10th frame |
| 206 | # For 10th frame, just sum all rolls from roll_index onwards |
| 207 | total_score += sum(self.rolls[roll_index:]) |
| 208 | break |
| 209 | |
| 210 | return total_score |