aoc2024/day05.py
2024-12-05 06:58:29 +01:00

52 lines
940 B
Python

#!/usr/bin/env python3
from functools import cmp_to_key
o = {}
p = {}
i = []
with open("day05") as f:
l = f.readline()
while l != '\n':
a,b = map(int, l.strip().split('|'))
if a in o: o[a].add(b)
else: o[a] = {b}
if b in p: p[b].add(a)
else: p[b] = {a}
l = f.readline()
for l in f:
i.append(list(map(int, l.strip().split(','))))
# 1
res = 0
un = []
for l in i:
for j in range(len(l)):
if l[j] in o:
if not set(l[j+1:]) <= o[l[j]]:
un.append(l)
break
if l[j] in p:
if not set(l[:j]) <= p[l[j]]:
un.append(l)
break
else:
res += l[len(l)//2]
# 2
def cmp(a,b):
if a in o and b in o[a]: return -1
if b in o and a in o[a]: return 1
else: return 0
res = 0
for l in un:
ls = sorted(l, key=cmp_to_key(cmp))
res += ls[len(ls)//2]