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Solved part 1 of day 12

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Rokas Puzonas 2020-12-12 15:03:13 +02:00
parent bc9e5aefef
commit e3d5e8b0c3
3 changed files with 844 additions and 0 deletions
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S2
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R90
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S2
R90
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L90
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R90
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L90
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N2
E3
L180
N1
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F64
W1
R180
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R180
F28
L180
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F100
E1
S4
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R90
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W5
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N5
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R90
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L180
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N5
W2
R180
W1
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L90
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R90
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L180
W1
F88
E3
R90
F13
W1
F13
W4
R90
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F98
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E5
R90
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L180
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E1
F70
L180
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L180
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F77
E2
F81
E2
S1
F41
L90
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R90
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R90
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R90
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R90
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E1
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S2
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N1
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E1
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F24
W1
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L90
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L90
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F41
L90
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L90
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N5
L90
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W1
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W1
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L90
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S3
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R90
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N2
L180
L180
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E5
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R90
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E2
F73
S4
F71
L90
E1
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E5
N3
E2
N5
L270
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E5
F30
N1
R90
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F15
E4
R180
F12
E2
F95
E2
S4
F13
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E1
N4
E3
L270
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N2
R180
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W2
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W4
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E1
L180
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E5
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W4
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L90
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F80
E1
F13
S2
E3
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R180
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L90
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L90
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F31
W5
R90
F21
S5
L90
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L90
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S1
R180
W5
F14
S5
W5
S1
F56
L90
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S4
N4
E1
R180
S1
R90
E3
N4
R90
S2
E5
S4
W4
R90
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S4
R90
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L90
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E3
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L90
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W1
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R90
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F38
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N2
R90
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L90
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E1
F96
E3
S4
R180
F28
S2
F93
L270
N3
R90
N2
E4
S1
F47
L270
F9
N2
F80
S4
L180
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W2
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L90
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R90
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R90
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W5
R90
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R90
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F12
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L180
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def getInstructions(filename):
with open(filename, "r") as f:
return [(line[0], int(line[1:])) for line in f.read().split()]
def directionToOffset(direction):
if direction == "E":
return (1, 0)
elif direction == "N":
return (0, -1)
elif direction == "W":
return (-1, 0)
elif direction == "S":
return (0, 1)
else:
raise Exception(f"Invalid cardinal direction '{direction}'")
def degreesToOffset(degrees):
degrees %= 360
if degrees == 0:
return (1, 0)
elif degrees == 90:
return (0, -1)
elif degrees == 180:
return (-1, 0)
elif degrees == 270:
return (0, 1)
else:
raise Exception(f"Invalid degrees '{degrees}'")
if __name__ == "__main__":
currentDirection = 0
currentX, currentY = 0, 0
for instruction in getInstructions("input.txt"):
opcode, value = instruction
if opcode == "L":
currentDirection += value
elif opcode == "R":
currentDirection -= value
else:
dirX, dirY = 0, 0
if opcode == "F":
dirX, dirY = degreesToOffset(currentDirection)
elif opcode == "B":
dirX, dirY = degreesToOffset(currentDirection)
dirX, dirY = -dirX, -dirY
else:
dirX, dirY = directionToOffset(opcode)
currentX += dirX * value
currentY += dirY * value
print(abs(currentX) + abs(currentY))

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F10
N3
F7
R90
F11