def part2():
bags = {}
for line in inputs:
root, *children = re.split(DELIMETER, line)
bags[root] = children
return utility.solution({'count': count_bags(bags, TARGET)})
def part1():
executed = set()
bootcode = Interpreter(inputs) \
.inject(custom, executed) \
.run()
return utility.solution({'accumulator': bootcode.accumulator}, test=5)
def part2():
slopes = [(1, 1), (3, 1), (5, 1), (7, 1), (1, 2)]
product = 1
for x, y in slopes:
product *= check_slope(grid, x, y)
return utility.solution({'product': product})
def part1():
"""Find two entries in the input file that add to 2020, report the product."""
for e1 in inputs:
for e2 in inputs:
if e1 + e2 == 2020:
return utility.solution({
'product': e1 * e2,
'numbers': (e1, e2)
})
def part2():
"""Find three entries in the input file that add to 2020, report the product."""
for e1 in inputs:
for e2 in inputs:
for e3 in inputs:
if e1 + e2 + e3 == 2020:
return utility.solution({
'product': e1 * e2 * e3,
'numbers': (e1, e2, e3)
})
def part1():
valid = 0
for bound, letter, password in inputs:
count = password.count(letter[0])
lower, upper = [int(b) for b in bound.split('-')]
if count >= lower and count <= upper:
valid += 1
return utility.solution({'valid': valid})
def part2():
valid = 0
for bound, letter, password in inputs:
lower, upper = [int(b) for b in bound.split('-')]
lp, up = password[lower - 1], password[upper - 1]
if (lp == letter[0]) ^ (up == letter[0]):
valid += 1
return utility.solution({'valid': valid})
def part1():
tree = {}
for line in inputs:
root, *children = re.split(DELIMETER, line)
for child in children:
if child == 'no other': continue
key = child[2:]
tree[key] = [*tree.get(key, []), root]
return utility.solution({'bags': traverse(tree, TARGET)}, test=4)
def part2():
records = parse()
valid = 0
for record in records:
is_super = set(record.keys()) >= REQUIRED
if is_super and all(
validator(record[field])
for field, validator in FIELDS.items()):
valid += 1
return utility.solution({'valid': valid})
def part2():
seat_id = lambda x, y: x * 8 + y
seats = [seat_id(*binary_partition(ticket)) for ticket in inputs]
seats.sort()
missing = [
seats[i] + 1 for i in range(len(seats) - 1)
if seats[i] + 1 != seats[i + 1]
]
return utility.solution({'missing': max(missing)})
def part2():
start = 0
while True:
idx, total, walk = start, 0, []
while total < SUM_TO:
total += inputs[idx]
walk.append(inputs[idx])
if total == SUM_TO:
return utility.solution({'val': min(walk) + max(walk)},
test=None)
idx += 1
start += 1
def part1():
idx = BUFFER
while idx < len(inputs):
preamble = inputs[idx - BUFFER:idx]
cmp = inputs[idx]
found = False
for x in preamble:
if (cmp - x) in preamble:
found = True
if not found:
return utility.solution({'val': cmp}, test=127)
idx += 1
def part1():
jolts = sorted([*inputs])
one_jolt, three_jolt, prev = 0, 0, 0
for jolt in jolts:
diff = jolt - prev
if diff == 1:
one_jolt += 1
elif diff == 3:
three_jolt += 1
prev = jolt
return utility.solution({'sol': one_jolt * (three_jolt + 1)}, test=220)
def part2():
jolts = sorted([0, *inputs, max(inputs) + 3])
MAX = len(jolts)
def cmp(i, j):
return jolts[j] - jolts[i] <= 3
@lru_cache
def arrange(i):
if i == MAX - 1:
return 1
return sum(
[arrange(j) for j in range(i + 1, min(i + 4, MAX)) if cmp(i, j)])
return utility.solution({'sol': arrange(0)}, test=None)
def part2():
idx, found = 0, False
while not found:
temps, executed = [*inputs], set()
name, _ = temps[idx].split()
_from, _to = ('jmp', 'nop') if name == 'jmp' else ('nop', 'jmp')
temps[idx] = temps[idx].replace(_from, _to)
bootcode = Interpreter(temps) \
.inject(custom, executed) \
.run()
if not bootcode.suspend:
found = True
idx += 1
return utility.solution({'accumulator': bootcode.accumulator})
def part1():
records = parse()
valid = sum(1 for record in records if set(record.keys()) >= REQUIRED)
return utility.solution({'valid': valid}, test=2)
def part1():
trees = check_slope(grid, 3, 1)
return utility.solution({'trees': trees})
def part1():
seat_id = lambda x, y: x * 8 + y
seats = [seat_id(*binary_partition(ticket)) for ticket in inputs]
return utility.solution({'max_seat': max(seats)}, test=820)
def part2():
answers = map(len, map(distinct_group, groups))
return utility.solution({'sum': sum(answers)}, test=6)
