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day 7 part 2

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magical 2025-12-07 08:14:18 +00:00
parent 84fe8156a0
commit 8877dff48a
1 changed files with 12 additions and 7 deletions
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19
day07/sol.py
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@ -1,25 +1,30 @@
from collections import Counter
def solve(input): def solve(input):
splits = 0 splits = 0
pos = [] pos = []
paths = Counter()
for row in open(input): for row in open(input):
row = row.strip() row = row.strip()
next = [] paths.clear()
for i in pos: for i,count in pos:
if row[i] == '.': if row[i] == '.':
next.append(i) paths[i] += count
elif row[i] == '^': elif row[i] == '^':
if i-1 >= 0: if i-1 >= 0:
next.append(i-1) paths[i-1] += count
if i+1 < len(row): if i+1 < len(row):
next.append(i+1) paths[i+1] += count
splits += 1 splits += 1
start = row.find('S') start = row.find('S')
if start >= 0: if start >= 0:
next.append(start) paths[start] += 1
pos = sorted(set(next)) pos = sorted(paths.items())
# part 1
print(splits) print(splits)
# part 2
print(sum(paths.values()))
solve("sample") solve("sample")
solve("input") solve("input")