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09a.py
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09a.py
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import numpy as np
# grid = np.zeros((100,100), dtype="S1")
# grid[0,50] = 'H'
# print(grid)
# print(grid.nbytes)
def get_grid_size(input):
# max_steps = {
# 'L': 0,
# 'R': 0,
# 'U': 0,
# 'D': 0,
# }
# sum_steps = {
# 'L': 0,
# 'R': 0,
# 'U': 0,
# 'D': 0,
# }
# all_steps = {
# 'L': [],
# 'R': [],
# 'U': [],
# 'D': [],
# }
# for line in sorted(input):
# dir, steps = line.split()
# steps = int(steps)
# all_steps[dir].append(steps)
# # if max_steps[dir] < steps:
# # max_steps[dir] = steps
# # print(all_steps)
# sum_r = sum(all_steps['R'])
# sum_l = sum(all_steps['L'])
# if sum_l > sum_r:
# width = sum_r + ((sum_r - sum_l) * -1)
# else:
# width = sum_r
# print(sum_r, sum_l, sum_r - sum_l)
# print("WIDTH:", width)
# sum_u = sum(all_steps['U'])
# sum_d = sum(all_steps['D'])
# if sum_u > sum_d:
# height = sum_d + ((sum_d - sum_u) * -1)
# else:
# height = sum_d
# print("HEIGHT:", height)
# print(max_r, sum_r, sum_l)
# exit(0)
# width = (max_steps['L'] + max_steps['R']) * 4
# height = (max_steps['U'] + max_steps['D']) * 4
width = 0
height = 0
offset_w = 0 # width
offset_h = 0 # height
for line in input:
dir, steps = line.split()
steps = int(steps)
if dir == "R":
offset_w += steps
if offset_w > width:
width = offset_w
elif dir == "L":
if offset_w - steps <= 0:
width += (steps - offset_w)
offset_w = 0
elif dir == "D":
offset_h += steps
if offset_h > height:
height = offset_h
elif dir == "U":
if offset_h - steps <= 0:
height += (steps - offset_h)
offset_h = 0
print("WIDTH:", width)
print("HEIGHT:", height)
exit(0)
return width, height
def get_tpos(hpos, tpos, dir):
diff = [hpos[0]-tpos[0], hpos[1]-tpos[1]]
print(diff)
return tpos
def main():
with open("09-ex.txt", "r") as fh:
lines = fh.read().splitlines()
# width, height = get_grid_size(lines)
width = 550
height = 550
spos = [(height // 2) - 1, (width // 2) - 1] # Start position
hpos = [spos[0], spos[1]] # Head position
tpos = [spos[0], spos[1]] # Tail position
grid = np.zeros((height, width), dtype='S1')
grid[spos[0], spos[1]] = 'H'
print(width, height, spos)
first_hpos = hpos.copy()
# Parse instructions, move head and tail
for line in lines:
dir, steps = line.split()
steps = int(steps)
if dir == "L":
for _ in range(steps):
if hpos[1] - 1 >= 0:
# print("hpos before:", hpos, end=" -- ")
hpos[1] -= 1
grid[tpos[0], tpos[1]] = "#"
tpos = get_tpos(hpos, tpos, dir)
grid[tpos[0], tpos[1]] = "T"
# print("hpos after:", hpos, "dir --", dir, "steps --", steps)
else:
print(hpos, steps)
raise RuntimeError("We've calculated the width wrong here...")
elif dir == "R":
for _ in range(steps):
if hpos[1] + 1 < width:
# print("hpos before:", hpos, end=" -- ")
hpos[1] += 1
grid[tpos[0], tpos[1]] = "#"
tpos = get_tpos(hpos, tpos, dir)
grid[tpos[0], tpos[1]] = "T"
# print("hpos after:", hpos, "dir --", dir, "steps --", steps)
else:
print(hpos, steps)
raise RuntimeError("We've calculated the width wrong here...")
elif dir == "U":
for _ in range(steps):
if hpos[0] - 1 >= 0:
# print("hpos before:", hpos, end=" -- ")
hpos[0] -= 1
grid[tpos[0], tpos[1]] = "#"
tpos = get_tpos(hpos, tpos, dir)
grid[tpos[0], tpos[1]] = "T"
# print("hpos after:", hpos, "dir --", dir, "steps --", steps)
else:
print(hpos, steps)
raise RuntimeError("We've calculated the height wrong here...")
elif dir == "D":
for _ in range(steps):
if hpos[0] + 1 < height:
# print("hpos before:", hpos, end=" -- ")
hpos[0] += 1
grid[tpos[0], tpos[1]] = "#"
tpos = get_tpos(hpos, tpos, dir)
grid[tpos[0], tpos[1]] = "T"
# print("hpos after:", hpos, "dir --", dir, "steps --", steps)
else:
print(hpos, steps)
raise RuntimeError("We've calculated the width wrong here...")
last_hpos = hpos.copy()
print("Head position:", hpos)
print("first:", first_hpos)
print("last:", last_hpos)
# with np.printoptions(threshold=np.inf):
# print(grid)
if __name__ == "__main__":
main()