feat: Redo of the AoC repo starting over with 2015 and keeping up with

2025 (completed day 2 so far)

15/3/main.py

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+'''AoC day 2'''
+
+def get_new_pos(curr_pos, instruction):
+    if instruction == '<':
+        new_pos = (curr_pos[0] - 1, curr_pos[1])
+    elif instruction == '>':
+        new_pos = (curr_pos[0] + 1, curr_pos[1])
+    elif instruction == '^':
+        new_pos = (curr_pos[0], curr_pos[1] + 1)
+    elif instruction == 'v':
+        new_pos = (curr_pos[0], curr_pos[1] - 1)
+    else:
+        new_pos = (0, 0)
+
+    return new_pos
+
+
+def process_instructions(instruction_set: str) -> int:
+    '''Run through a set of instructions to return the number of unique houses visited
+
+    Keyword args:
+    instruction_set (str) - Directional arrow instruction string giving moves to new locations
+
+    Returns:
+    int - Number of unique houses visited
+    '''
+    visited_house_coordinates = {(0,0)}
+    curr_pos = (0, 0)
+
+    for instruction in instruction_set:
+        curr_pos = get_new_pos(curr_pos, instruction)
+
+        visited_house_coordinates.add(curr_pos)
+
+    return len(visited_house_coordinates)
+
+def process_robo_instructions(instruction_set: str) -> int:
+    visited_house_coordinates = {(0,0)}
+    santa_pos = (0,0)
+    robot_pos = (0,0)
+
+    for index, instruction in enumerate(instruction_set):
+        if index % 2 == 0:
+            santa_pos = get_new_pos(santa_pos, instruction)
+            visited_house_coordinates.add(santa_pos)
+        else:
+            robot_pos = get_new_pos(robot_pos, instruction)
+            visited_house_coordinates.add(robot_pos)
+
+    return len(visited_house_coordinates)
+
+def main():
+    '''Entrypoint'''
+    with open('input.txt', encoding='utf-8') as fh:
+        instruction_set = fh.readline()
+        unique_houses = process_instructions(instruction_set)
+
+        print(f'Part1: {unique_houses}')
+
+        robo_houses = process_robo_instructions(instruction_set)
+
+        print(f'Part2: {robo_houses}')
+
+
+if __name__ == "__main__":
+    main()

15/3/test_day3.py

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+import pytest
+
+from main import process_instructions, process_robo_instructions
+
+@pytest.mark.parametrize('given, expected',
+                         [
+                            ('>', 2),
+                            ('^>v<', 4),
+                            ('^v^v^v^v^v', 2)
+                         ])
+def test_instructions(given, expected):
+    assert process_instructions(given) == expected
+
+
+@pytest.mark.parametrize('given, expected',
+                         [
+                            ('^v', 3)
+                         ])
+def test_part2_instructions(given, expected):
+    assert process_robo_instructions(given) == expected