def b():
w = 25
h = 6
out = [None] * (w * h)
layers = list(u.chunks(img, w * h))
for i in range(w * h):
for layer in layers:
if layer[i] != 2:
out[i] = layer[i]
break
m = {(x, y): row[x]
for y, row in enumerate(list(u.chunks(out, w))) for x in range(w)}
u.print_matrix(m, " #")
def b():
cpos = 0
skip = 0
l = list(range(256))
vals = [ord(d) for d in data] + [17, 31, 73, 47, 23]
#vals = [3, 4, 1, 5, 17, 31, 73, 47, 23]
for round in range(64):
print('.', end='')
for length in vals:
left = cpos
right = cpos + length - 1
while left < right:
lt = left % len(l)
rt = right % len(l)
tmp = l[lt]
l[lt] = l[rt]
l[rt] = tmp
left += 1
right -= 1
cpos += length
cpos += skip
skip += 1
out = []
for chunk in u.chunks(l, 16):
val = functools.reduce(operator.xor, chunk)
out.append(f'{val:02x}')
return ''.join(out)
def b():
cs = u.chunks(data, 2)
s, rs = zip(*cs)
sps = set(itertools.accumulate(dirs[c] for c in s))
srps = set(itertools.accumulate(dirs[c] for c in rs))
return len(sps | srps)
def a():
groups = data.split("\n\n")
criteria, ticket, nearby = [l.split("\n") for l in groups]
rules = {}
for c in criteria:
k, vs = c.split(":")
rs = u.lmap(tuple, u.chunks(u.ints(vs.replace("-", " to ")), 2))
rules[k] = rs
def valid(val):
for ruleset in rules.values():
for a, b in ruleset:
if a <= val <= b:
return True
return False
s = 0
for ticket in nearby[1:]:
t = u.ints(ticket)
for v in t:
if not valid(v):
s += v
return s
def a():
out = defaultdict(int)
for x, y, tile in u.chunks(intcode.run(data, []), 3):
out[(x, y)] = tile
# print_tiles(out)
blocks = len([v for v in out.values() if v == 2])
return blocks
def b():
def min_perim(l, w, h):
return min(2 * sum(s) for s in sides(l, w, h))
return sum(
math.prod((l, w, h)) + min_perim(l, w, h)
for l, w, h in u.chunks(u.ints(data), 3))
def b():
nums = [u.ints(line) for line in lines]
cs = zip(*nums)
s = 0
for tri in u.chunks(itertools.chain.from_iterable(cs), 3):
s += possible(tri)
return s
def a():
def area(l, w, h):
return sum(2 * math.prod(s) for s in sides(l, w, h))
def slack(l, w, h):
return min(math.prod(s) for s in sides(l, w, h))
return sum(
area(l, w, h) + slack(l, w, h)
for l, w, h in u.chunks(u.ints(data), 3))
def a():
w = 25
h = 6
best_zero = None
res = None
for layer in u.chunks(img, w * h):
counts = Counter(layer)
if best_zero is None or counts[0] < best_zero:
res = counts[1] * counts[2]
best_zero = counts[0]
return res
def a():
_, p0, _, p1 = ints
s0 = s1 = 0
die = zip(itertools.count(1), itertools.cycle(range(1, 101)))
rolls = ((max(a), sum(b)) for a, b in (zip(*c) for c in u.chunks(die, 3)))
for rollcount, total in rolls:
np0 = (p0 + total) % 10 or 10
ns0 = s0 + np0
if ns0 >= 1000:
break
s1, s0 = ns0, s1
p1, p0 = np0, p1
return s1 * rollcount
def b():
groups = data.split("\n\n")
criteria, my_ticket, nearby = [g.split("\n") for g in groups]
my_ticket = u.ints(my_ticket[1])
rules = {}
for c in criteria:
k, vs = c.split(":")
rs = u.lmap(tuple, u.chunks(u.ints(vs.replace("-", " ")), 2))
rules[k] = rs
def valid_for_field(v, field):
return any(a <= v <= b for a, b in rules[field])
def valid(val):
return any(valid_for_field(val, field) for field in rules)
valid_nearby = []
for ticket in nearby[1:]:
t = u.ints(ticket)
if all(valid(v) for v in t):
valid_nearby.append(t)
possible = []
for _ in range(len(my_ticket)):
possible.append(set(rules.keys()))
for ticket in valid_nearby:
for i, v in enumerate(ticket):
pl = list(possible[i])
for field in pl:
if not valid_for_field(v, field):
possible[i].remove(field)
mapping = {}
allocated = set()
for i, p in sorted(enumerate(possible), key=lambda x: x[1]):
field = (p - allocated).pop()
mapping[i] = field
allocated.add(field)
s = functools.reduce(
operator.mul,
(my_ticket[i] for i in mapping if mapping[i].startswith("departure")),
1,
)
return s
def run(program, init):
panels = defaultdict(int)
pos = (0, 0)
d = N
panels[pos] = init
buf = [panels[pos]]
out = intcode.run(program, buf)
for color, turn_right in u.chunks(out, 2):
panels[pos] = color
d = right[d] if turn_right else left[d]
pos = (pos[0] + d[0], pos[1] + d[1])
buf.append(panels[pos])
return panels
def a():
keys = {
complex(x, y): c
for y, row in enumerate(u.chunks(range(1, 10), 3))
for x, c in enumerate(row)
}
def clamp(c):
r = max(0, min(c.real, 2))
i = max(0, min(c.imag, 2))
return complex(r, i)
code = []
pos = complex(1, 1)
for line in lines:
for d in line:
pos += dirs[d]
pos = clamp(pos)
code.append(str(keys[pos]))
return "".join(code)
def b():
prog = [int(c) for c in data.split(",")]
prog[0] = 2
ball = None
for i in range(len(prog) - 2):
if prog[i] == 0 and prog[i + 1] == 3 and prog[i + 2] == 0:
ball = i + 1
break
for r in range(ball - 17, ball + 18):
prog[r] = 1
score = 0
inps = [0] * 6500
out = defaultdict(int)
for x, y, tile in u.chunks(intcode.run(prog, inps), 3):
if (x, y) == (-1, 0):
score = tile
# print_tiles(out, score)
else:
out[(x, y)] = tile
return score
def position_scanners():
scanners = [set(u.chunks(u.ints(scanner)[1:], 3)) for scanner in data.split('\n\n')]
fingerprints = u.lmap(fingerprint, scanners)
positions = {0: (0,0,0)}
relative_sensors = {0: scanners[0]}
solvable = deque([0])
while len(solvable) > 0:
i = solvable.popleft()
rscanner1 = relative_sensors[i]
for j, scanner2 in enumerate(scanners):
if j == i or j in positions or len(fingerprints[i] & fingerprints[j]) < threshold:
continue
aligned, position, rscanner2 = align_scanners(rscanner1, scanner2)
if aligned:
solvable.append(j)
positions[j] = position
relative_sensors[j] = rscanner2
sensors = {pt for v in relative_sensors.values() for pt in v}
return positions, sensors
def checksum(s):
return tuple(1 - operator.xor(*c) for c in u.chunks(s, 2))
def b():
draws = intlines[0]
boards = [board[1:] for board in u.chunks(intlines[1:], 6)]
results = [winner(board, draws) for board in boards]
_, unmarked, draw = max(results, key=lambda p: p[0])
return sum(unmarked) * draw
