Solve 12.1 and 12.2

12/12.py

@@ -0,0 +1,82 @@
+data = [(s[0], int(s[1:])) for s in """
+F10
+N3
+F7
+R90
+F11
+""".strip().split("\n")]
+with open("input") as f:
+    data = [(s[0], int(s[1:])) for s in f.read().strip().split("\n")]
+
+ship = (0, 0, 0)
+
+directions = {
+        0: (1, 0),
+        90: (0, 1),
+        180: (-1, 0),
+        270: (0, -1),
+        }
+
+def move(dx, dy, ship):
+    x, y, a = ship
+    return (x+dx, y+dy, a)
+
+def turn(sign, degree, ship):
+    x, y, a = ship
+    return (x, y, (a+sign*degree)%360)
+
+def moveF(value, ship):
+    x, y, a = ship
+    dx, dy = directions[a]
+    dx, dy = dx*value, dy*value
+    return move(dx, dy, ship)
+
+funcs = {
+        "L": lambda degree, ship: turn(1, degree, ship),
+        "R": lambda degree, ship: turn(-1, degree, ship),
+        "N": lambda value, ship: move(0, value, ship),
+        "S": lambda value, ship: move(0, -value, ship),
+        "E": lambda value, ship: move(value, 0, ship),
+        "W": lambda value, ship: move(-value, 0, ship),
+        "F": moveF,
+        }
+
+for op, value in data:
+    ship = funcs[op](value, ship)
+
+x, y, _ = ship
+print(abs(x)+abs(y))
+
+
+
+def turn90(waypoint):
+    x, y = waypoint
+    return (-y, x)
+def turn(sign, degree, waypoint):
+    for _ in range((360+sign*degree)%360//90):
+        waypoint = turn90(waypoint)
+    return waypoint
+def moveF(value, waypoint, ship):
+    dx, dy = waypoint
+    x, y = ship
+    return waypoint, (x+dx*value, y+dy*value)
+def move(dx, dy, ship):
+    x, y = ship
+    return (x+dx, y+dy)
+waypoint = (10, 1)
+ship = (0, 0)
+
+funcs = {
+        "L": lambda degree, waypoint, ship: (turn(1, degree, waypoint), ship),
+        "R": lambda degree, waypoint, ship: (turn(-1, degree, waypoint), ship),
+        "N": lambda value, waypoint, ship: (move(0, value, waypoint), ship),
+        "S": lambda value, waypoint, ship: (move(0, -value, waypoint), ship),
+        "E": lambda value, waypoint, ship: (move(value, 0, waypoint), ship),
+        "W": lambda value, waypoint, ship: (move(-value, 0, waypoint), ship),
+        "F": moveF,
+        }
+for op, value in data:
+    waypoint, ship = funcs[op](value, waypoint, ship)
+
+x, y = ship
+print(abs(x)+abs(y))

12/input

@@ -0,0 +1,787 @@
+W2
+F23
+S1
+W3
+L180
+W3
+R90
+N4
+F17
+S4
+W4
+R90
+W4
+E1
+N4
+F5
+N2
+R90
+F43
+N5
+L90
+F12
+S4
+W1
+S3
+W2
+N4
+F76
+S1
+W4
+W2
+F20
+N4
+F81
+W4
+N3
+R180
+W2
+N4
+W3
+F16
+N4
+L180
+F1
+W3
+F34
+W3
+S3
+F92
+L90
+S2
+L90
+E5
+N2
+F85
+W3
+R90
+W2
+F88
+N2
+L90
+W1
+N4
+L90
+E5
+N3
+L90
+F8
+E1
+L90
+N3
+F3
+F61
+S5
+R90
+W2
+F84
+W1
+L90
+E1
+S3
+W5
+F89
+E3
+F67
+E2
+E5
+F29
+N5
+W4
+F53
+N2
+E5
+F73
+W4
+L90
+S2
+R180
+N3
+R90
+F27
+N2
+F41
+L270
+W5
+F3
+N5
+F81
+R90
+N2
+W5
+N2
+R90
+S1
+R180
+S3
+L90
+E2
+F38
+S1
+E3
+S5
+F44
+N1
+F26
+E1
+S2
+F25
+E1
+S2
+F33
+S4
+R90
+N2
+W2
+F9
+R90
+F64
+W1
+S3
+E5
+R180
+N2
+L90
+S4
+E4
+L90
+S2
+F50
+S3
+R90
+F8
+E2
+N1
+R90
+S5
+S1
+F100
+N3
+F97
+R180
+S3
+L180
+F45
+W5
+S1
+E5
+E3
+F26
+N4
+R90
+N4
+F50
+W5
+R90
+F58
+S4
+W3
+E1
+N3
+R90
+S4
+E2
+F26
+N4
+L90
+F60
+W4
+N1
+F10
+E5
+L180
+N4
+E1
+F15
+E3
+L270
+F23
+R90
+F61
+R90
+F25
+L90
+W2
+S3
+R180
+F44
+W5
+E1
+R90
+S2
+R270
+W2
+S1
+F13
+E5
+N2
+R270
+F68
+F99
+W1
+F31
+N5
+F89
+E5
+N4
+W5
+N2
+F59
+E3
+L180
+E3
+L90
+L180
+S5
+F27
+E1
+S3
+R180
+N5
+E4
+L180
+N2
+E3
+W1
+L180
+F23
+N4
+E1
+F87
+N1
+E3
+F45
+W5
+F17
+L90
+N1
+L90
+W3
+S2
+F62
+R180
+F8
+R90
+F19
+W1
+S2
+S5
+W4
+F40
+F52
+S3
+F6
+R90
+S5
+W3
+S5
+E3
+W3
+S1
+F11
+S2
+E4
+F3
+R90
+L270
+E1
+S1
+W4
+L180
+W2
+S4
+E2
+N3
+W3
+S2
+W4
+L90
+F24
+W3
+F58
+E5
+R90
+F73
+E4
+F92
+R90
+F62
+W4
+R90
+W2
+S3
+W2
+F75
+N4
+R180
+W5
+S5
+W1
+S2
+L90
+S1
+E5
+L180
+N3
+W3
+F77
+E2
+S5
+L90
+E5
+S4
+L90
+S4
+F32
+L90
+W3
+F92
+W3
+S4
+W1
+R90
+F6
+R180
+E4
+W2
+R90
+W4
+S2
+W5
+S2
+F79
+R90
+S4
+F50
+S4
+W3
+F87
+W5
+R90
+S2
+F23
+E1
+N1
+R90
+F24
+L90
+F29
+N1
+R90
+E5
+N5
+F79
+W3
+L90
+S4
+E5
+S1
+F36
+W2
+R90
+F36
+R270
+F82
+E4
+F82
+S3
+F94
+N2
+L180
+S2
+E1
+N3
+F54
+S3
+F11
+E2
+R90
+W2
+F39
+R90
+S2
+W2
+R90
+E4
+N2
+E5
+F59
+W3
+R90
+W3
+F78
+N4
+F97
+S4
+W1
+F48
+N2
+E2
+R180
+F6
+R90
+W4
+R90
+E5
+F19
+N2
+R180
+F50
+W3
+N5
+R90
+N1
+W4
+F68
+R90
+N2
+L90
+F83
+E3
+N4
+W2
+F48
+W3
+E3
+L180
+F73
+R90
+F81
+W1
+R90
+F25
+S3
+F23
+L270
+S4
+F76
+W3
+F73
+N2
+E5
+L90
+N3
+W3
+R270
+F37
+S5
+R90
+F46
+S4
+E4
+F92
+L90
+N1
+L180
+W3
+S5
+F27
+N1
+L180
+F91
+W4
+N3
+F11
+L180
+N1
+E3
+L90
+S2
+R90
+S2
+E3
+F55
+S4
+E2
+S2
+F3
+E3
+F58
+W4
+N4
+E5
+F2
+N1
+W3
+F86
+E5
+F60
+W3
+F9
+S4
+R180
+F44
+E4
+N1
+F74
+L270
+E4
+L270
+F52
+R180
+F70
+L180
+E1
+F68
+R90
+E5
+W4
+R90
+E4
+F27
+S2
+L90
+W5
+N5
+R90
+E2
+N5
+F15
+R180
+F72
+S5
+L90
+F31
+R90
+E4
+R270
+S3
+W3
+R270
+N1
+S3
+R90
+F80
+R90
+E2
+N5
+W2
+L90
+F40
+N1
+F14
+L90
+W2
+F9
+W4
+R90
+F88
+R180
+N1
+E5
+F96
+N1
+F4
+R90
+F56
+F14
+L90
+F8
+R180
+S2
+F75
+L90
+E5
+R90
+F81
+N1
+W3
+F46
+R270
+S2
+F15
+W3
+R180
+F27
+W3
+F53
+R90
+E5
+L90
+S3
+W1
+F62
+S5
+W2
+S5
+R90
+F82
+W2
+N4
+L270
+E1
+N5
+E2
+F52
+N1
+E2
+S2
+R180
+N1
+L90
+W2
+L90
+F78
+L90
+W1
+N4
+F81
+E1
+N4
+W2
+F86
+W1
+F30
+W5
+N4
+E3
+F42
+N2
+F5
+R90
+F60
+L90
+E5
+S4
+E5
+S3
+F70
+S3
+R90
+W5
+R90
+W2
+N3
+L180
+E3
+S2
+E3
+F82
+E2
+F5
+E4
+E1
+S1
+R180
+W4
+F1
+R180
+N4
+E1
+S3
+E3
+F59
+W3
+F73
+L90
+F74
+R90
+E1
+F54
+W3
+F54
+L90
+S4
+F100
+F56
+L90
+F26
+L180
+F50
+W3
+S2
+E3
+F87
+N2
+W5
+F50
+S2
+W5
+S1
+F46
+R90
+F89
+L90
+N4
+F53
+W1
+F56
+E4
+S5
+F68
+L90
+F22
+R90
+F73
+S5
+S5
+L90
+E4
+S2
+R270
+E3
+L90
+F20
+L90
+F84
+S1
+F29
+W2
+S4
+L90
+W4
+N1
+F65
+E5
+L90
+S3
+F38
+L90
+L90
+N5
+F50
+S1
+F16
+R90
+F12
+E2
+N3
+F49
+R90
+F4
+N1
+R90
+F80
+R180
+W2
+L90
+S5
+E1
+F93
+R90
+F32
+L180
+F44
+L90
+S4
+F42
+N2
+R90
+S1
+F56
+L180
+E2
+F90
+N1
+F3
+L90
+E1
+F91
+L90
+W4
+L90
+F10
+S3
+W5
+S3
+F87