def day10b():
"""Day 10a."""
items = helpers.get_input_integers("day10")
device = max(items) + 3
jolts = [0] + sorted(items) + [device]
matrix = []
n = 0
while n < len(jolts):
i = jolts[n]
group = [i]
while n + 1 < len(jolts) and jolts[n + 1] == i + 1:
n += 1
i = jolts[n]
group.append(i)
n += 1
matrix.append(group)
factors = []
for row in matrix:
print(row)
if len(row) < 3:
factors.append(1)
elif len(row) == 3:
factors.append(2)
elif len(row) == 4:
factors.append(4)
elif len(row) == 5:
factors.append(7)
print(factors)
print(f"Arrangements: {math.prod(factors)}")
def day9a():
"""Day 9a."""
items = helpers.get_input_integers("day9")
n = 0
length = 25
preamble = items[n:n + length]
for item in items[length:]:
helpers.check_encoding(preamble, item)
n += 1
preamble = items[n:n + length]
def day1a():
"""Day 1: Report Repair."""
items = helpers.get_input_integers("day1")
for i in items:
for j in items:
if i == j:
continue
if i + j == 2020:
break
if i + j == 2020:
break
print(f"\nAnswer: {i} + {j} = 2020; {i} * {j} = {i * j}")
def day1b():
"""Day 1: Report Repair."""
items = helpers.get_input_integers("day1")
for i in items:
for j in items:
if i == j:
continue
for k in items:
if i in [j, k]:
continue
if i + j + k == 2020:
break
if i + j + k == 2020:
break
if i + j + k == 2020:
break
print(f"\nAnswer: {i} + {j} + {k} = 2020; {i} * {j} * {k} = {i * j * k}")
def day10a():
"""Day 10a."""
items = helpers.get_input_integers("day10")
device = max(items) + 3
jolts = sorted(items) + [device]
ones = 0
threes = 0
last = 0
for n in jolts:
diff = n - last
if diff == 1:
ones += 1
elif diff == 3:
threes += 1
else:
print("ERROR: Bad diff!")
last = n
print(f"{ones} ones x {threes} threes = {ones * threes}")
def day9b():
"""Day 9b."""
items = helpers.get_input_integers("day9")
value = 105950735
length = 2
while True:
print(f"Length: {length}")
start = 0
end = length
while end <= len(items):
group = items[start:end]
if sum(group) == value:
print("SUCCESS!")
print(group)
weakness = min(group) + max(group)
print(f"Weakness: {weakness} (length: {length}")
sys.exit()
start += 1
end += 1
length += 1