Days 7, 8, 9. 9 was fun.

This commit is contained in:
2023-12-06 21:12:59 -05:00
parent 67fa2ba6c0
commit 259482800b
8 changed files with 3563 additions and 1 deletions

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@@ -6,4 +6,7 @@
- Day 4: 7:08 but top 100 required 3:33 still okay
- Day 5: 11:56 but 7:58 for top 100... getting better?
- Day 6: 3:50 but 2:25 for leaderboard :D
- Day 7:
- Day 7: 27:55 and 14:47 for leaderboard; okay, I would say
- Day 8: 61:00 and 10:00 for leaderboard; I need template code for searching coordinate systems
- Day 9: 58:00 and 7:32 for leaderboard; I need code for 2D stuff
- Day 10:

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d7.py Normal file
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import re
from string import ascii_lowercase, ascii_uppercase, digits
EXAMPLE = """
$ cd /
$ ls
dir a
14848514 b.txt
8504156 c.dat
dir d
$ cd a
$ ls
dir e
29116 f
2557 g
62596 h.lst
$ cd e
$ ls
584 i
$ cd ..
$ cd ..
$ cd d
$ ls
4060174 j
8033020 d.log
5626152 d.ext
7214296 k
"""
def clean(text: str) -> list[str]:
return list(filter(lambda l: l.strip() != "", text.splitlines()))
def solve(lines: list[str]):
sizes = {}
res = 0
current_dir = ()
for line in lines:
if line.startswith("$ cd"):
c = line.replace("$ cd ", "").strip()
if c == "..":
current_dir = tuple(list(current_dir)[:-1])
else:
current_dir = tuple(list(current_dir) + [c])
elif line[0] in digits:
size, _ = line.split()
size = int(size)
try:
sizes[current_dir] += size
except KeyError:
sizes[current_dir] = size
for i in range(1, len(current_dir)):
outer_dir = tuple(list(current_dir)[:-i])
try:
sizes[outer_dir] += size
except KeyError:
sizes[outer_dir] = size
for _, size in sizes.items():
if size <= 100000:
res += size
# 23:50
return res
def solve2(lines: list[str]):
sizes = {}
res = 0
current_dir = ()
for line in lines:
if line.startswith("$ cd"):
c = line.replace("$ cd ", "").strip()
if c == "..":
current_dir = tuple(list(current_dir)[:-1])
else:
current_dir = tuple(list(current_dir) + [c])
elif line[0] in digits:
size, _ = line.split()
size = int(size)
try:
sizes[current_dir] += size
except KeyError:
sizes[current_dir] = size
for i in range(1, len(current_dir)):
outer_dir = tuple(list(current_dir)[:-i])
try:
sizes[outer_dir] += size
except KeyError:
sizes[outer_dir] = size
total_space = 70000000
unused_space = 30000000
used_space = sizes[("/",)]
res = 2**32
for _, size in sizes.items():
if total_space - used_space + size >= unused_space and size < res:
res = size
# 27:55
return res
def main():
example = clean(EXAMPLE)
print("Example 1:", solve(example))
data = clean(open("i7.txt").read())
print("Solution 1:", solve(data))
example = clean(EXAMPLE)
print("Example 2:", solve2(example))
data = clean(open("i7.txt").read())
print("Solution 2:", solve2(data))
if __name__ == "__main__":
main()

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d8.py Normal file
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import re
from string import ascii_lowercase, ascii_uppercase
EXAMPLE = """
30373
25512
65332
33549
35390
"""
def clean(text: str) -> list[str]:
return list(filter(lambda l: l.strip() != "", text.splitlines()))
def is_visible(trees, y_tree, x_tree):
y_max = len(trees)
x_max = len(trees[0])
tree_height = trees[y_tree][x_tree]
for x in range(0, x_tree):
if trees[y_tree][x] >= tree_height:
break
else:
return True
for x in range(x_tree + 1, x_max):
if trees[y_tree][x] >= tree_height:
break
else:
return True
for y in range(0, y_tree):
if trees[y][x_tree] >= tree_height:
break
else:
return True
for y in range(y_tree + 1, y_max):
if trees[y][x_tree] >= tree_height:
break
else:
return True
return False
def solve(lines: list[str]):
res = 0
trees = []
for i in range(len(lines)):
line = lines[i]
trees.append(list(map(int, line)))
for y in range(len(trees)):
for x in range(len(trees)):
if is_visible(trees, y, x):
res += 1
else:
pass
return res
def scenic_score(trees, y_tree, x_tree):
y_max = len(trees)
x_max = len(trees[0])
if x_tree == 0 or y_tree == 0 or x_tree == x_max - 1 or y_tree == y_max - 1:
return 0
tree_height = trees[y_tree][x_tree]
left, right, up, down = 0, 0, 0, 0
for x in range(x_tree - 1, -1, -1):
if trees[y_tree][x] < tree_height:
left += 1
else:
left += 1
break
for x in range(x_tree + 1, x_max):
if trees[y_tree][x] < tree_height:
right += 1
else:
right += 1
break
for y in range(y_tree - 1, -1, -1):
if trees[y][x_tree] < tree_height:
up += 1
else:
up += 1
break
for y in range(y_tree + 1, y_max):
if trees[y][x_tree] < tree_height:
down += 1
else:
down += 1
break
score = up * down * left * right
# print(f"{y_tree=} {x_tree=} {left=} {right=} {up=} {down=} {score=}")
return score
def solve2(lines: list[str]):
trees = []
for i in range(len(lines)):
line = lines[i]
trees.append(list(map(int, line)))
max_score = 0
for y in range(len(trees)):
for x in range(len(trees)):
score = scenic_score(trees, y, x)
if score > max_score:
max_score = score
return max_score
def main():
example = clean(EXAMPLE)
print("Example 1:", solve(example))
data = clean(open("i8.txt").read())
print("Solution 1:", solve(data))
example = clean(EXAMPLE)
print("Example 2:", solve2(example))
data = clean(open("i8.txt").read())
print("Solution 2:", solve2(data))
if __name__ == "__main__":
main()

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d9.py Normal file
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EXAMPLE = """
R 4
U 4
L 3
D 1
R 4
D 1
L 5
R 2
"""
def clean(text: str) -> list[str]:
return list(filter(lambda l: l.strip() != "", text.splitlines()))
def new_pos(h_pos, t_pos, dir):
if dir == "R":
new_h_pos = (h_pos[0] + 1, h_pos[1])
elif dir == "U":
new_h_pos = (h_pos[0], h_pos[1] + 1)
elif dir == "L":
new_h_pos = (h_pos[0] - 1, h_pos[1])
elif dir == "D":
new_h_pos = (h_pos[0], h_pos[1] - 1)
elif dir == "NONE":
new_h_pos = (h_pos[0], h_pos[1])
else:
raise Exception("Unexpected direction.")
# xxxxx
# x---x
# x-O-x
# x---x
# xxxxx
dx, dy = t_pos[0] - new_h_pos[0], t_pos[1] - new_h_pos[1]
delta = {
(-1, -1): (0, 0),
(-1, 0): (0, 0),
(-1, 1): (0, 0),
(0, -1): (0, 0),
(0, 0): (0, 0),
(0, 1): (0, 0),
(1, -1): (0, 0),
(1, 0): (0, 0),
(1, 1): (0, 0),
(-2, 2): (1, -1),
(-2, 1): (1, -1),
(-2, 0): (1, 0),
(-2, -1): (1, 1),
(-2, -2): (1, 1),
(2, 2): (-1, -1),
(2, 1): (-1, -1),
(2, 0): (-1, 0),
(2, -1): (-1, 1),
(2, -2): (-1, 1),
(-1, 2): (1, -1),
(-1, -2): (1, 1),
(0, 2): (0, -1),
(0, -2): (0, 1),
(1, 2): (-1, -1),
(1, -2): (-1, 1),
}
dx_, dy_ = delta[(dx, dy)]
new_t_pos = t_pos[0] + dx_, t_pos[1] + dy_
# print(f"{h_pos=} {t_pos=} {dir=}")
# print(f"{new_h_pos=} {dx=} {dy=}")
# print(f"{new_t_pos=}")
# print("----")
return new_t_pos, new_h_pos
def solve(lines: list[str]):
pos = set()
h_pos = (0, 0)
t_pos = (0, 0)
pos.add(t_pos)
for i in range(len(lines)):
dir, amount = lines[i].split()
for _ in range(int(amount)):
t_pos, h_pos = new_pos(h_pos, t_pos, dir)
pos.add(t_pos)
# 44:00
return len(pos)
EXAMPLE2 = """
R 5
U 8
L 8
D 3
R 17
D 10
L 25
U 20
"""
def solve2(lines: list[str]):
vis = set()
poss = [(0, 0) for _ in range(10)]
vis.add((0, 0))
for i in range(len(lines)):
dir, amount = lines[i].split()
for _ in range(int(amount)):
for i in range(len(poss) - 1):
h_pos = poss[i]
t_pos = poss[i + 1]
if i == 0:
t_pos, h_pos = new_pos(h_pos, t_pos, dir)
else:
t_pos, h_pos = new_pos(h_pos, t_pos, "NONE")
poss[i] = h_pos
poss[i + 1] = t_pos
vis.add(poss[-1])
# 58:00
return len(vis)
def main():
example = clean(EXAMPLE)
print("Example 1:", solve(example))
data = clean(open("i9.txt").read())
print("Solution 1:", solve(data))
example = clean(EXAMPLE2)
print("Example 2:", solve2(example))
data = clean(open("i9.txt").read())
print("Solution 2:", solve2(data))
if __name__ == "__main__":
main()

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dx.py Normal file
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import re
from string import ascii_lowercase, ascii_uppercase
EXAMPLE = """
"""
def clean(text: str) -> list[str]:
return list(filter(lambda l: l.strip() != "", text.splitlines()))
def solve(lines: list[str]):
res = 0
for i, line in enumerate(lines):
print(i, line)
return res
def solve2(lines: list[str]):
res = 0
for i, line in enumerate(lines):
print(i, line)
return res
def main():
example = clean(EXAMPLE)
print("Example 1:", solve(example))
return
data = clean(open("i6.txt").read())
print("Solution 1:", solve(data))
return
example = clean(EXAMPLE)
print("Example 2:", solve2(example))
return
data = clean(open("i6.txt").read())
print("Solution 2:", solve2(data))
if __name__ == "__main__":
main()

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i7.txt Normal file

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i8.txt Normal file
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111301302244231442013332415144033330063530643146335532313306033656410450441505505240142210004121122

2000
i9.txt Normal file

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