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import math
def intersection(l1, l2):
l1 = set(l1)
l2 = set(l2)
return [value for value in l2 if value in l1]
def man_dist(point):
return abs(point[0]) + abs(point[1])
def pt1(input):
wire1 = []
wire2 = []
for wire, moves in zip((wire1, wire2), (input[0], input[1])):
x = 0
y = 0
dx = 0
dy = 0
for move in moves.split(","):
if move[0] == "D":
dx = 0
dy = -1
elif move[0] == "U":
dx = 0
dy = 1
elif move[0] == "R":
dx = 1
dy = 0
elif move[0] == "L":
dx = -1
dy = 0
for i in range(int(move[1:])):
x += dx
y += dy
wire.append((x, y))
points = intersection(wire1, wire2)
dist = man_dist(points[0])
for point in points[1:]:
dist = min(dist, man_dist(point))
return dist
def pt2(input):
wire1 = {}
wire2 = {}
# wire {(x,y) : dist}
for wire, moves in zip((wire1, wire2), (input[0], input[1])):
x = 0
y = 0
dx = 0
dy = 0
steps = 0
for move in moves.split(","):
if move[0] == "D":
dx = 0
dy = -1
elif move[0] == "U":
dx = 0
dy = 1
elif move[0] == "R":
dx = 1
dy = 0
elif move[0] == "L":
dx = -1
dy = 0
for i in range(int(move[1:])):
x += dx
y += dy
steps += 1
wire[(x, y)] = steps
points = intersection(list(wire1.keys()), list(wire2.keys()))
length = wire1[points[0]] + wire2[points[0]]
for point in points[1:]:
length = min(length, wire1[point] + wire2[point])
return length
if __name__ == "__main__":
input = open("../input/03", "r").readlines()
print(pt1(input))
print(pt2(input))
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