blob: 1cff601f47053b5e54705ae9fc2efba5e20e1d3f (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
|
input = "data/22_2024.txt"
data = open(input).read().strip()
def mix(x, y):
return x ^ y
def prune(x):
return x % 16777216
def prices(x):
res = [x]
for _ in range(2000):
x = prune(mix(x, 64 * x))
x = prune(mix(x, x // 32))
x = prune(mix(x, x * 2048))
res.append(x)
return res
def changes(p):
return [p[i + 1] - p[i] for i in range(len(p) - 1)]
def getscores(p, c):
res = {}
for i in range(len(c) - 3):
pattern = (c[i], c[i + 1], c[i + 2], c[i + 3])
if pattern not in res:
res[pattern] = p[i + 4]
return res
p1, score = 0, {}
for line in data.split("\n"):
p = prices(int(line))
p1 += p[-1]
p = [x % 10 for x in p]
c = changes(p)
s = getscores(p, c)
for k, v in s.items():
if k not in score:
score[k] = v
else:
score[k] += v
print(p1)
print(max(score.values()))
|