day01

bob/day01/day01-p1.py

@@ -0,0 +1,36 @@
+
+
+def dial(action, position):
+    if action[0] == "R":
+        position += action[1]
+    else:
+        position -= action[1]
+
+    position = position % 100
+
+    return position
+
+def read_input(filename):
+    actions = []
+    for line in open(filename):
+        line = line.strip()
+
+        direction = line[:1]
+        steps = int(line[1:])
+        actions.append((direction,steps))
+    return actions
+
+
+# filename = "day01/my_example_input"
+# filename = "day01/example_input" # Output is 3
+filename = "day01/input" # Output is 992
+actions = read_input(filename)
+
+position = 50
+password = 0
+for action in actions:
+    position = dial(action, position)
+    if position == 0:
+        password += 1
+
+print(f"Password is {password}")

bob/day01/day01-p2.py

@@ -0,0 +1,44 @@
+
+
+def dial(action, start_position):
+    if action[0] == "R":
+        position = start_position + action[1]
+    else:
+        position = start_position - action[1]
+
+    # Count rotations over "0" (multiples of 100)
+    zeros = int(abs(position) / 100)
+
+    # Negative position, or exactly "0", caused one extra "0" hit
+    # Except when starting at 0!
+    if position <= 0 and start_position != 0:
+        zeros += 1
+
+    position = position % 100
+
+    return position, zeros
+
+def read_input(filename):
+    actions = []
+    for line in open(filename):
+        line = line.strip()
+
+        direction = line[:1]
+        steps = int(line[1:])
+        actions.append((direction,steps))
+    return actions
+
+
+# filename = "day01/my_example_input"
+# filename = "day01/example_input" # Output is 6
+filename = "day01/input" # Output is 6133
+actions = read_input(filename)
+
+position = 50
+password = 0
+
+for action in actions:
+    position, zeros = dial(action, position)
+    password += zeros
+
+print(f"Password is {password}")

bob/day01/example_input

@@ -0,0 +1,10 @@
+L68
+L30
+R48
+L5
+R60
+L55
+L1
+L99
+R14
+L82

bob/day01/my_example_input

@@ -0,0 +1,2 @@
+L50
+L5