82 lines
2.6 KiB
Python
82 lines
2.6 KiB
Python
import fileinput
|
|
import sys
|
|
|
|
input = fileinput.input()
|
|
|
|
seeds = [int(seed) for seed in next(input).split()[1:]]
|
|
next(input)
|
|
next(input)
|
|
|
|
|
|
def parse_map(input):
|
|
try:
|
|
while line := next(input).strip():
|
|
yield tuple(int(n) for n in line.strip().split())
|
|
next(input)
|
|
except StopIteration:
|
|
pass
|
|
|
|
yield (0, 0, sys.maxsize)
|
|
|
|
|
|
seed_to_soil = list(parse_map(input))
|
|
soil_to_fert = list(parse_map(input))
|
|
fert_to_water = list(parse_map(input))
|
|
water_to_light = list(parse_map(input))
|
|
light_to_temp = list(parse_map(input))
|
|
temp_to_humid = list(parse_map(input))
|
|
humid_to_loc = list(parse_map(input))
|
|
|
|
|
|
def transform_ranges(map, ranges):
|
|
for start, length in ranges:
|
|
# find the start of the range
|
|
(dst_start, src_start, len) = next((dst, src, len) for (dst, src, len) in map if src <= start < (src + len))
|
|
|
|
end = start + length
|
|
src_end = src_start + len
|
|
|
|
# yield the starting range
|
|
yield (dst_start + start - src_start, min(src_end, end) - start)
|
|
|
|
# if range is not complete, recurse into the rest
|
|
if end > src_end:
|
|
yield from transform_ranges(map, [(src_end, end - src_end)])
|
|
|
|
|
|
def part1():
|
|
result = sys.maxsize
|
|
|
|
for seed in seeds:
|
|
soil = next(dst + seed - src for (dst, src, len) in seed_to_soil if src <= seed < (src + len))
|
|
fert = next(dst + soil - src for (dst, src, len) in soil_to_fert if src <= soil < (src + len))
|
|
water = next(dst + fert - src for (dst, src, len) in fert_to_water if src <= fert < (src + len))
|
|
light = next(dst + water - src for (dst, src, len) in water_to_light if src <= water < (src + len))
|
|
temp = next(dst + light - src for (dst, src, len) in light_to_temp if src <= light < (src + len))
|
|
humid = next(dst + temp - src for (dst, src, len) in temp_to_humid if src <= temp < (src + len))
|
|
loc = next(dst + humid - src for (dst, src, len) in humid_to_loc if src <= humid < (src + len))
|
|
result = min(result, loc)
|
|
|
|
return result
|
|
|
|
|
|
def part2():
|
|
result = sys.maxsize
|
|
|
|
for start, len in zip(*(iter(seeds),) * 2):
|
|
soils = transform_ranges(seed_to_soil, [(start, len)])
|
|
ferts = transform_ranges(soil_to_fert, soils)
|
|
waters = transform_ranges(fert_to_water, ferts)
|
|
lights = transform_ranges(water_to_light, waters)
|
|
temps = transform_ranges(light_to_temp, lights)
|
|
humids = transform_ranges(temp_to_humid, temps)
|
|
locs = transform_ranges(humid_to_loc, humids)
|
|
|
|
(loc, _) = min(locs)
|
|
result = min(result, loc)
|
|
|
|
return result
|
|
|
|
|
|
print(part1(), part2())
|