diff options
| -rw-r--r-- | day12/day12.py | 102 | ||||
| -rw-r--r-- | day12/input | 770 |
2 files changed, 872 insertions, 0 deletions
diff --git a/day12/day12.py b/day12/day12.py new file mode 100644 index 0000000..2476725 --- /dev/null +++ b/day12/day12.py @@ -0,0 +1,102 @@ +"""Day 12.""" +import math + +with open("input") as f: + instructions = f.read().rstrip().split("\n") + +DIRECTIONS = ("N", "E", "S", "W") +CURRENT_DIRECTION = "E" +CORDS = { + "x": 0, + "y": 0, +} +WAYPOINT = { + 'x': 10, + 'y': 1, +} + + +def left(current_direction, degree): + idx = DIRECTIONS.index(current_direction) - (degree // 90) + return DIRECTIONS[idx % len(DIRECTIONS)] + + +def right(current_direction, degree): + idx = DIRECTIONS.index(current_direction) + (degree // 90) + return DIRECTIONS[idx % len(DIRECTIONS)] + + +def update_coords(direction, value): + if direction == "N": + CORDS["y"] += value + if direction == "E": + CORDS["x"] += value + if direction == "S": + CORDS["y"] -= value + if direction == "W": + CORDS["x"] -= value + + +for inst in instructions: + direction, value = inst[0], int(inst[1:]) + if direction == "L": + CURRENT_DIRECTION = left(CURRENT_DIRECTION, value) + elif direction == "R": + CURRENT_DIRECTION = right(CURRENT_DIRECTION, value) + elif direction == "F": + update_coords(CURRENT_DIRECTION, value) + else: + update_coords(direction, value) + +# Part 1 +part_1 = abs(CORDS["x"]) + abs(CORDS["y"]) +print(part_1) +assert part_1 == 882 + +# reset coords +CORDS = { + "x": 0, + "y": 0, +} + +def update_waypoint(direction, value): + if direction == "N": + WAYPOINT["y"] += value + if direction == "E": + WAYPOINT["x"] += value + if direction == "S": + WAYPOINT["y"] -= value + if direction == "W": + WAYPOINT["x"] -= value + + +def clockwise(degrees): + """rotate clockwise.""" + x = WAYPOINT["x"] + y = WAYPOINT["y"] + rads = math.radians(degrees % 360) + return ( + round(x * math.cos(rads) + y * math.sin(rads)), + round(-x * math.sin(rads) + y * math.cos(rads)) + ) + +for inst in instructions: + direction, value = inst[0], int(inst[1:]) + if direction == "L": + newx, newy = clockwise(360 - value) + WAYPOINT["x"] = newx + WAYPOINT["y"] = newy + elif direction == "R": + newx, newy = clockwise(value) + WAYPOINT["x"] = newx + WAYPOINT["y"] = newy + elif direction == "F": + CORDS["x"] += WAYPOINT["x"] * value + CORDS["y"] += WAYPOINT["y"] * value + else: + update_waypoint(direction, value) + + +part_2 = abs(CORDS["x"]) + abs(CORDS["y"]) +assert part_2 == 28885 +print(part_2) diff --git a/day12/input b/day12/input new file mode 100644 index 0000000..c64cbfd --- /dev/null +++ b/day12/input @@ -0,0 +1,770 @@ +R90 +F58 +S2 +E4 +F28 +W3 +N2 +F25 +E1 +F24 +W2 +F91 +S3 +F83 +L90 +F24 +R90 +N3 +R90 +F5 +W5 +E1 +S1 +E5 +F47 +F83 +N1 +F64 +W2 +R90 +S1 +R180 +N2 +R180 +S3 +F35 +E2 +S3 +W2 +R270 +F57 +E5 +F100 +N3 +L90 +F70 +E5 +L90 +F65 +L90 +S2 +W5 +F73 +L90 +E3 +R90 +W2 +S2 +L180 +E4 +W3 +R90 +E2 +F18 +N4 +W5 +R90 +S1 +F55 +W2 +L90 +S1 +L180 +E4 +N1 +R90 +F31 +N5 +E4 +R90 +W4 +F18 +W4 +N2 +L90 +F6 +N3 +L180 +F89 +R90 +N4 +L180 +S4 +W1 +F87 +N1 +F80 +E4 +R90 +N4 +F38 +E5 +F74 +S4 +R180 +S1 +L90 +W1 +F88 +S1 +F42 +S1 +R90 +F2 +R90 +E2 +S1 +F57 +E1 +F53 +R180 +F97 +W2 +R90 +F70 +R180 +W1 +R180 +W5 +E5 +N1 +E5 +F63 +N3 +F24 +L90 +S5 +W5 +R90 +W4 +F27 +R90 +E2 +L180 +E4 +F16 +L90 +F47 +S3 +E1 +S2 +L90 +W5 +F80 +E4 +F10 +N5 +E3 +N4 +W2 +L90 +E1 +F83 +R180 +S4 +L90 +E1 +F94 +N2 +R90 +S5 +L180 +E1 +F40 +E5 +L180 +W5 +F57 +E1 +N5 +W5 +F62 +L180 +W3 +F12 +E4 +F93 +R270 +F8 +S3 +W3 +L90 +W1 +N1 +E4 +L90 +E2 +S2 +E1 +L270 +E5 +N5 +F81 +L90 +W5 +F82 +E5 +L90 +F24 +F3 +F14 +L180 +N5 +E1 +F11 +R90 +F22 +L90 +S1 +F82 +S4 +F38 +L90 +F31 +R180 +W4 +F88 +E3 +R90 +N5 +F9 +S3 +W4 +L90 +W5 +R90 +F5 +S4 +F91 +N4 +S4 +W4 +S4 +F78 +N2 +F67 +L180 +N3 +R90 +F65 +N2 +E1 +F46 +E2 +L180 +S4 +E2 +F98 +L90 +W2 +N1 +E3 +F7 +S4 +F90 +S2 +W3 +R90 +F30 +E4 +F2 +L90 +F17 +E4 +R90 +F94 +N3 +E5 +R180 +S4 +F76 +E2 +F94 +R90 +N5 +W2 +F89 +W1 +F83 +N5 +W5 +F62 +S1 +W4 +N5 +E2 +R90 +F14 +R90 +N5 +W4 +R180 +E2 +R90 +L90 +F67 +N4 +L90 +E4 +F93 +W5 +F85 +L180 +F45 +W2 +F78 +N3 +F90 +L90 +W1 +S2 +L90 +S5 +E5 +F82 +S4 +F36 +E5 +L90 +E1 +F13 +S2 +E3 +F65 +L90 +E3 +E4 +F1 +W5 +S3 +F14 +L90 +F47 +L90 +S3 +W4 +F18 +E1 +N3 +E5 +F58 +E5 +S1 +W2 +F48 +W5 +F65 +N5 +E1 +N3 +R90 +N2 +L90 +N4 +F21 +R90 +F58 +W1 +F7 +R90 +E4 +N5 +F47 +W4 +L90 +N4 +R90 +E1 +L180 +F8 +E3 +W4 +F41 +E3 +S5 +E5 +S3 +E3 +F14 +N4 +R90 +W3 +L90 +E5 +R180 +W4 +S1 +N2 +F93 +L90 +F41 +R180 +F37 +R90 +E1 +L180 +N5 +F96 +W3 +R90 +E1 +F88 +S2 +E2 +L90 +N2 +W4 +F34 +E4 +F69 +L90 +N3 +F18 +W3 +S4 +F44 +E2 +L90 +N2 +F55 +R90 +E1 +L90 +S5 +E2 +N3 +L90 +N1 +F55 +W5 +N2 +E2 +F20 +S2 +W5 +S1 +W5 +R180 +F100 +F44 +S2 +L90 +E3 +F98 +N3 +R90 +W4 +F14 +N2 +F87 +W5 +F12 +L180 +S2 +W1 +N1 +W1 +R90 +L180 +F64 +E2 +F41 +L90 +F20 +R270 +F91 +N4 +L180 +F28 +W4 +F40 +R90 +F40 +F36 +E3 +L270 +F76 +L90 +N2 +F15 +N5 +E4 +L180 +S1 +R90 +E1 +F81 +R90 +F96 +N1 +E5 +R90 +S5 +L90 +S1 +S4 +R90 +F30 +E1 +N5 +E2 +S3 +F97 +N3 +R90 +N1 +R90 +E3 +R180 +E3 +F8 +R90 +W2 +F27 +L90 +N5 +W3 +L90 +E5 +R180 +S1 +L90 +F51 +S4 +L180 +N1 +W4 +F71 +W2 +R90 +E4 +F29 +E4 +L90 +L90 +F68 +W2 +F57 +E3 +R90 +S2 +F94 +W4 +S2 +L180 +E3 +N2 +F52 +E3 +S1 +S5 +R90 +E1 +F35 +W3 +F53 +R270 +E3 +F81 +S2 +L90 +W4 +F86 +N5 +E4 +R90 +N5 +F99 +L180 +F65 +R90 +S2 +W3 +F33 +E3 +R270 +F34 +E1 +F56 +S2 +E5 +R180 +N2 +E3 +N3 +F30 +N2 +F22 +E5 +F10 +N2 +F16 +N1 +F31 +R90 +E2 +F78 +E4 +R180 +S3 +R90 +F80 +E5 +S1 +F49 +E1 +S2 +E4 +N4 +R90 +F9 +W1 +E4 +N3 +N5 +E4 +L90 +S5 +E2 +R90 +F74 +R180 +N2 +F98 +S2 +W4 +W4 +F73 +E2 +N4 +E1 +F25 +S2 +E5 +L90 +F96 +N2 +E3 +N3 +F16 +S5 +L90 +F43 +S2 +R90 +S1 +F46 +S3 +F82 +S5 +S4 +E5 +F58 +R90 +F51 +R90 +N4 +L90 +W3 +S4 +R90 +F15 +E1 +S4 +W3 +S2 +W1 +R90 +F76 +S1 +L180 +F5 +R180 +E1 +L180 +W3 +F47 +W4 +F68 +E5 +F75 +W3 +N1 +R90 +S1 +W5 +R90 +E2 +F78 +W2 +L90 +F24 +W5 +R90 +F75 +E1 +F35 +E5 +R90 +F57 +L180 +S1 +L90 +F90 +R180 +F63 +S3 +R180 +W3 +F79 +N5 +E4 +F81 +E3 +F6 +R90 +E4 +L90 +W5 +L180 +W2 +S4 +F26 +L90 +E5 +S3 +L90 +F3 +L90 +S2 +R90 +F55 +W5 +S1 +E3 +F63 +L180 +N2 +E2 +L90 +S4 +E3 +F18 +W4 +N2 +W5 +R90 +E5 +L90 +F96 +N3 +F7 +N1 +F87 +R90 +F53 +R90 +W5 +S3 +F94 |