diff options
| -rw-r--r-- | 2023/day3/input | 140 | ||||
| -rw-r--r-- | 2023/day3/input_test | 10 | ||||
| -rw-r--r-- | 2023/day3/solve.py | 46 |
3 files changed, 196 insertions, 0 deletions
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\ No newline at end of file diff --git a/2023/day3/input_test b/2023/day3/input_test new file mode 100644 index 0000000..624ea4f --- /dev/null +++ b/2023/day3/input_test @@ -0,0 +1,10 @@ +467..114.. +...*...... +..35..633. +......#... +617*...... +.....+.58. +..592..... +......755. +...$.*.... +.664.598..
\ No newline at end of file diff --git a/2023/day3/solve.py b/2023/day3/solve.py new file mode 100644 index 0000000..bc84dc0 --- /dev/null +++ b/2023/day3/solve.py @@ -0,0 +1,46 @@ +from typing import List + +def is_part_number(lines:List[str], column_count: int, row_pos: int, column_start: int, column_end: int) -> bool: + min_column = max(column_start - 1, 0) + min_row = max(row_pos - 1, 0) + max_column = min(column_end + 1, column_count - 1) + max_row = min(row_pos + 1, len(lines) - 1) + + for row_idx in range(min_row, max_row + 1): + for col_idx in range(min_column, max_column + 1): + char = lines[row_idx][col_idx] + if char != "." and not char.isdigit(): + return True + + return False + +def add_if_part_number(result: int, lines:List[str], column_count: int, row_pos: int, column_start: int, column_end: int) -> int: + if is_part_number(lines, column_count, row_pos, column_start, column_end): + result += int(lines[row_pos][column_start:column_end + 1]) + + return result + + +data = [] +with open("input") as f: + for line in f.readlines(): + data.append(line.strip()) + +result = 0 + +columns = len(data[0]) +for row_idx, line in enumerate(data): + number_start_idx = -1 + for ii in range(columns): + if line[ii].isdigit(): + if number_start_idx == -1: + number_start_idx = ii + elif number_start_idx != -1: + result = add_if_part_number(result, data, columns, row_idx, number_start_idx, ii - 1) + number_start_idx = -1 + + if number_start_idx != -1: + result = add_if_part_number(result, data, columns, row_idx, number_start_idx, columns - 1) + +print(result) + |