2025 lets goooo

2025/01/part_1_solution.py

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+testing = False
+
+if not testing:
+    with open(r"2025/01/input.txt", "r") as file:
+        input = file.read()
+else:
+    input = '''L68
+L30
+R48
+L5
+R60
+L55
+L1
+L99
+R14
+L82'''
+answer:int = 0
+TEST_EXPECTED_ANSWER:int = 3
+
+# make a list to simulate dial?
+dial = [i for i in range(100)]
+#print(dial)
+
+direction = {
+    'L':'-=',
+    'R':'+='
+}
+
+position:int = 50
+
+def perform_operation(value, operator, operand):
+    if operator == "+=":
+        return value + operand
+    elif operator == "-=":
+        return value - operand
+    else:
+        raise ValueError("Unsupported operator")
+
+def move_dial(position, movement):
+    #print(movement)
+    direction_to_move = movement[0]
+    amount_to_move = movement[1:]
+    #print(direction_to_move)
+    #print(amount_to_move)
+    decide = direction[direction_to_move]
+    #print(decide)
+    new_position = perform_operation(int(position), decide, int(amount_to_move))
+    return new_position % 100
+
+win_counter:int = 0
+for step in input.split('\n'):
+    #print(position)
+    position = move_dial(position, step)
+    #print(position)
+    #print(dial[position])
+    if dial[position] == 0:
+        win_counter += 1
+
+answer = win_counter
+
+if testing:
+    if answer == TEST_EXPECTED_ANSWER:
+        print('test successful')
+    else:
+        print(f'wrong... expected {TEST_EXPECTED_ANSWER} received {answer}')
+else:
+    print(answer)
+

2025/01/part_2_solution.py

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+testing = False
+
+if not testing:
+    with open(r"2025/01/input.txt", "r") as file:
+        input = file.read()
+else:
+    input = '''L68
+L30
+R48
+L5
+R60
+L55
+L1
+L99
+R14
+L82'''
+
+answer:int = 0
+TEST_EXPECTED_ANSWER:int = 6
+
+# make a list to simulate dial?
+dial = [i for i in range(100)]
+
+position:int = 50
+zero_count: int = 0 
+
+def move_dial_with_zero_count(current_position, movement):
+    direction_to_move = movement[0]
+    amount_to_move = int(movement[1:])
+    
+    # Determine the direction
+    if direction_to_move == 'L':
+        step = -1
+    elif direction_to_move == 'R':
+        step = 1
+    else:
+        raise ValueError("Invalid direction")
+    
+    # Count how many times we hit 0 during this rotation
+    count = 0
+    current = current_position
+    
+    # Go through each step of the rotation
+    for _ in range(amount_to_move):
+        current = (current + step) % 100
+        if current == 0:
+            count += 1
+
+    return current, count
+
+# Process each step
+for step in input.strip().split('\n'):
+    #print(f"Before: {position}")
+    position, zero_count_increment = move_dial_with_zero_count(position, step)
+    zero_count += zero_count_increment
+    #print(f"After:  {position} (zero hits: {zero_count_increment})")
+
+answer = zero_count
+
+if testing:
+    if answer == TEST_EXPECTED_ANSWER:
+        print('test successful')
+    else:
+        print(f'wrong... expected {TEST_EXPECTED_ANSWER} received {answer}')
+else:
+    print(answer)
+