2025(01): do part 2

Marit had to help me :D.

2025/01/part1.py

@@ -1,5 +1,3 @@
-# TODO: Get the inout.
-
 with open("input", "r") as fp:
 	moves = fp.readlines()
 

2025/01/part2.py

@@ -0,0 +1,30 @@
+infile="input"
+
+with open(infile, "r") as fp:
+	moves = fp.readlines()
+
+counter = 50
+code = 0
+for idx, move in enumerate(moves):
+	direction, number = move[0], int(move[1:])
+
+	assert direction in ['L', 'R'], f"Direction should be left (L) or right (R), not '{direction}'"
+	assert number > 0, f"Number should be positive, not '{number}'"
+
+	# Do counterthings
+	prev_counter = counter
+	sgn = 1 if direction == "R" else -1
+	counter += sgn*number
+
+	# Going left is weird
+	if direction == 'L':
+		if prev_counter != 0 and counter % 100 == 0:
+			code += 1
+		if prev_counter == 0 and counter % 100 != 0:
+			code -= 1
+
+	# If we cross zero, let's store that.
+	code += abs(counter // 100)
+	counter %= 100
+
+print("The actual password is:", code)