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Solve day 10 part 1

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Gabriel Augendre 2020-12-10 14:36:35 +01:00
parent 640c7f3cc8
commit 3d14a24f38
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GPG Key ID: 1E693F4CE4AEE7B4
6 changed files with 232 additions and 43 deletions
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0
2020/__init__.py Normal file
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42
2020/day10-adapter-array.py
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@ -1,42 +0,0 @@
import copy
import itertools
from typing import List
def main(filename: str, expected_part_1: int = None, expected_part_2: int = None):
print(f"\n+ Running on {filename}")
with open(filename) as f:
jolts = sorted(map(int, f.read().strip().split("\n"))) # type: List[int]
jolts.append(jolts[-1] + 3)
counter_part_1 = solve_part_1(jolts)
counter_part_2 = 0
print(f"1. Found {counter_part_1}")
if expected_part_1:
assert expected_part_1 == counter_part_1
print(f"2. Found {counter_part_2}")
if expected_part_2:
assert expected_part_2 == counter_part_2
def solve_part_1(jolts):
diffs = count_diffs(jolts)
return diffs[1] * diffs[3]
def count_diffs(jolts):
diffs = {1: 0, 2: 0, 3: 0}
previous = 0
for jolt in jolts:
diffs[jolt - previous] += 1
previous = jolt
return diffs
if __name__ == "__main__":
main("inputs/day10-test1", 35, 8)
main("inputs/day10-test2", 220, 19208)
main("inputs/day10", 2450)

83
2020/day10_adapter_array.py Normal file
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@ -0,0 +1,83 @@
import copy
import functools
import itertools
from typing import List, Tuple
import networkx as nx
def main(filename: str, expected_part_1: int = None, expected_part_2: int = None):
print(f"\n+ Running on {filename}")
with open(filename) as f:
jolts = sorted(map(int, f.read().strip().split("\n"))) # type: List[int]
jolts.append(jolts[-1] + 3)
counter_part_1 = solve_part_1(jolts)
jolts.insert(0, 0)
counter_part_2 = solve_part_2(jolts)
print(f"1. Found {counter_part_1}")
if expected_part_1:
assert expected_part_1 == counter_part_1
print(f"2. Found {counter_part_2}")
if expected_part_2:
assert expected_part_2 == counter_part_2
def solve_part_1(jolts):
diffs = count_diffs(jolts)
return diffs[1] * diffs[3]
def count_diffs(jolts):
diffs = {1: 0, 2: 0, 3: 0}
previous = 0
for jolt in jolts:
diffs[jolt - previous] += 1
previous = jolt
return diffs
def solve_part_2(jolts: List[int]):
jolts = tuple(jolts)
return with_recursion(jolts, jolts[-1])
@functools.lru_cache(maxsize=None)
def with_recursion(jolts: Tuple[int], target: int):
if target == 0:
return 1
counter = 0
for jolt in jolts:
if can_reach(jolt, target):
counter += with_recursion(jolts, jolt)
return counter
def can_reach(jolt, target):
return 0 < target - jolt < 4
def with_graph(jolts):
"""
It works but it's way too slow for the real deal.
"""
graph = nx.DiGraph()
combinations = itertools.combinations(jolts, 2)
for combination in combinations:
combination = sorted(combination)
diff = combination[1] - combination[0]
if 0 < diff < 4:
graph.add_edge(combination[0], combination[1])
paths_counter = 0
for _ in nx.all_simple_paths(graph, jolts[0], jolts[-1]):
paths_counter += 1
return paths_counter
if __name__ == "__main__":
main("inputs/day10-test1", 35, 8)
main("inputs/day10-test2", 220, 19208)
main("inputs/day10", 2450)

13
2020/test_day10_part2.py Normal file
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@ -0,0 +1,13 @@
from day10_adapter_array import solve_part_2
def test_only_one_path():
assert solve_part_2([0, 1]) == 1
def test_one_long_paths():
assert solve_part_2([0, 1, 4, 7]) == 1
def test_two_paths():
assert solve_part_2([0, 1, 2]) == 2

136
poetry.lock generated
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@ -6,6 +6,28 @@ category = "dev"
optional = false
python-versions = "*"
[[package]]
name = "atomicwrites"
version = "1.4.0"
description = "Atomic file writes."
category = "dev"
optional = false
python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
[[package]]
name = "attrs"
version = "20.3.0"
description = "Classes Without Boilerplate"
category = "dev"
optional = false
python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
[package.extras]
dev = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface", "furo", "sphinx", "pre-commit"]
docs = ["furo", "sphinx", "zope.interface"]
tests = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface"]
tests_no_zope = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six"]
[[package]]
name = "cfgv"
version = "3.2.0"
@ -14,6 +36,14 @@ category = "dev"
optional = false
python-versions = ">=3.6.1"
[[package]]
name = "colorama"
version = "0.4.4"
description = "Cross-platform colored terminal text."
category = "dev"
optional = false
python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
[[package]]
name = "decorator"
version = "4.4.2"
@ -61,6 +91,14 @@ python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,>=2.7"
[package.extras]
license = ["editdistance"]
[[package]]
name = "iniconfig"
version = "1.1.1"
description = "iniconfig: brain-dead simple config-ini parsing"
category = "dev"
optional = false
python-versions = "*"
[[package]]
name = "networkx"
version = "2.5"
@ -93,6 +131,17 @@ category = "dev"
optional = false
python-versions = "*"
[[package]]
name = "packaging"
version = "20.7"
description = "Core utilities for Python packages"
category = "dev"
optional = false
python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
[package.dependencies]
pyparsing = ">=2.0.2"
[[package]]
name = "pdbpp"
version = "0.10.2"
@ -110,6 +159,17 @@ wmctrl = "*"
funcsigs = ["funcsigs"]
testing = ["funcsigs", "pytest"]
[[package]]
name = "pluggy"
version = "0.13.1"
description = "plugin and hook calling mechanisms for python"
category = "dev"
optional = false
python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
[package.extras]
dev = ["pre-commit", "tox"]
[[package]]
name = "pre-commit"
version = "2.9.2"
@ -126,6 +186,14 @@ pyyaml = ">=5.1"
toml = "*"
virtualenv = ">=20.0.8"
[[package]]
name = "py"
version = "1.9.0"
description = "library with cross-python path, ini-parsing, io, code, log facilities"
category = "dev"
optional = false
python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
[[package]]
name = "pygments"
version = "2.7.3"
@ -134,6 +202,14 @@ category = "main"
optional = false
python-versions = ">=3.5"
[[package]]
name = "pyparsing"
version = "2.4.7"
description = "Python parsing module"
category = "dev"
optional = false
python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
[[package]]
name = "pyreadline"
version = "2.1"
@ -150,6 +226,28 @@ category = "main"
optional = false
python-versions = "*"
[[package]]
name = "pytest"
version = "6.1.2"
description = "pytest: simple powerful testing with Python"
category = "dev"
optional = false
python-versions = ">=3.5"
[package.dependencies]
atomicwrites = {version = ">=1.0", markers = "sys_platform == \"win32\""}
attrs = ">=17.4.0"
colorama = {version = "*", markers = "sys_platform == \"win32\""}
iniconfig = "*"
packaging = "*"
pluggy = ">=0.12,<1.0"
py = ">=1.8.2"
toml = "*"
[package.extras]
checkqa_mypy = ["mypy (==0.780)"]
testing = ["argcomplete", "hypothesis (>=3.56)", "mock", "nose", "requests", "xmlschema"]
[[package]]
name = "pyyaml"
version = "5.3.1"
@ -203,17 +301,29 @@ python-versions = "*"
[metadata]
lock-version = "1.1"
python-versions = "3.8"
content-hash = "4419fde085bee7e6b0c5480981594be872c8f65085cf2c966652a33d763eecc7"
content-hash = "d3492eb0a2265986bb41e5d19316233006e02e29c8fd44e45535b7e2b9a52658"
[metadata.files]
appdirs = [
{file = "appdirs-1.4.4-py2.py3-none-any.whl", hash = "sha256:a841dacd6b99318a741b166adb07e19ee71a274450e68237b4650ca1055ab128"},
{file = "appdirs-1.4.4.tar.gz", hash = "sha256:7d5d0167b2b1ba821647616af46a749d1c653740dd0d2415100fe26e27afdf41"},
]
atomicwrites = [
{file = "atomicwrites-1.4.0-py2.py3-none-any.whl", hash = "sha256:6d1784dea7c0c8d4a5172b6c620f40b6e4cbfdf96d783691f2e1302a7b88e197"},
{file = "atomicwrites-1.4.0.tar.gz", hash = "sha256:ae70396ad1a434f9c7046fd2dd196fc04b12f9e91ffb859164193be8b6168a7a"},
]
attrs = [
{file = "attrs-20.3.0-py2.py3-none-any.whl", hash = "sha256:31b2eced602aa8423c2aea9c76a724617ed67cf9513173fd3a4f03e3a929c7e6"},
{file = "attrs-20.3.0.tar.gz", hash = "sha256:832aa3cde19744e49938b91fea06d69ecb9e649c93ba974535d08ad92164f700"},
]
cfgv = [
{file = "cfgv-3.2.0-py2.py3-none-any.whl", hash = "sha256:32e43d604bbe7896fe7c248a9c2276447dbef840feb28fe20494f62af110211d"},
{file = "cfgv-3.2.0.tar.gz", hash = "sha256:cf22deb93d4bcf92f345a5c3cd39d3d41d6340adc60c78bbbd6588c384fda6a1"},
]
colorama = [
{file = "colorama-0.4.4-py2.py3-none-any.whl", hash = "sha256:9f47eda37229f68eee03b24b9748937c7dc3868f906e8ba69fbcbdd3bc5dc3e2"},
{file = "colorama-0.4.4.tar.gz", hash = "sha256:5941b2b48a20143d2267e95b1c2a7603ce057ee39fd88e7329b0c292aa16869b"},
]
decorator = [
{file = "decorator-4.4.2-py2.py3-none-any.whl", hash = "sha256:41fa54c2a0cc4ba648be4fd43cff00aedf5b9465c9bf18d64325bc225f08f760"},
{file = "decorator-4.4.2.tar.gz", hash = "sha256:e3a62f0520172440ca0dcc823749319382e377f37f140a0b99ef45fecb84bfe7"},
@ -234,6 +344,10 @@ identify = [
{file = "identify-1.5.10-py2.py3-none-any.whl", hash = "sha256:cc86e6a9a390879dcc2976cef169dd9cc48843ed70b7380f321d1b118163c60e"},
{file = "identify-1.5.10.tar.gz", hash = "sha256:943cd299ac7f5715fcb3f684e2fc1594c1e0f22a90d15398e5888143bd4144b5"},
]
iniconfig = [
{file = "iniconfig-1.1.1-py2.py3-none-any.whl", hash = "sha256:011e24c64b7f47f6ebd835bb12a743f2fbe9a26d4cecaa7f53bc4f35ee9da8b3"},
{file = "iniconfig-1.1.1.tar.gz", hash = "sha256:bc3af051d7d14b2ee5ef9969666def0cd1a000e121eaea580d4a313df4b37f32"},
]
networkx = [
{file = "networkx-2.5-py3-none-any.whl", hash = "sha256:8c5812e9f798d37c50570d15c4a69d5710a18d77bafc903ee9c5fba7454c616c"},
{file = "networkx-2.5.tar.gz", hash = "sha256:7978955423fbc9639c10498878be59caf99b44dc304c2286162fd24b458c1602"},
@ -242,17 +356,33 @@ nodeenv = [
{file = "nodeenv-1.5.0-py2.py3-none-any.whl", hash = "sha256:5304d424c529c997bc888453aeaa6362d242b6b4631e90f3d4bf1b290f1c84a9"},
{file = "nodeenv-1.5.0.tar.gz", hash = "sha256:ab45090ae383b716c4ef89e690c41ff8c2b257b85b309f01f3654df3d084bd7c"},
]
packaging = [
{file = "packaging-20.7-py2.py3-none-any.whl", hash = "sha256:eb41423378682dadb7166144a4926e443093863024de508ca5c9737d6bc08376"},
{file = "packaging-20.7.tar.gz", hash = "sha256:05af3bb85d320377db281cf254ab050e1a7ebcbf5410685a9a407e18a1f81236"},
]
pdbpp = [
{file = "pdbpp-0.10.2.tar.gz", hash = "sha256:73ff220d5006e0ecdc3e2705d8328d8aa5ac27fef95cc06f6e42cd7d22d55eb8"},
]
pluggy = [
{file = "pluggy-0.13.1-py2.py3-none-any.whl", hash = "sha256:966c145cd83c96502c3c3868f50408687b38434af77734af1e9ca461a4081d2d"},
{file = "pluggy-0.13.1.tar.gz", hash = "sha256:15b2acde666561e1298d71b523007ed7364de07029219b604cf808bfa1c765b0"},
]
pre-commit = [
{file = "pre_commit-2.9.2-py2.py3-none-any.whl", hash = "sha256:949b13efb7467ae27e2c8f9e83434dacf2682595124d8902554a4e18351e5781"},
{file = "pre_commit-2.9.2.tar.gz", hash = "sha256:e31c04bc23741194a7c0b983fe512801e151a0638c6001c49f2bd034f8a664a1"},
]
py = [
{file = "py-1.9.0-py2.py3-none-any.whl", hash = "sha256:366389d1db726cd2fcfc79732e75410e5fe4d31db13692115529d34069a043c2"},
{file = "py-1.9.0.tar.gz", hash = "sha256:9ca6883ce56b4e8da7e79ac18787889fa5206c79dcc67fb065376cd2fe03f342"},
]
pygments = [
{file = "Pygments-2.7.3-py3-none-any.whl", hash = "sha256:f275b6c0909e5dafd2d6269a656aa90fa58ebf4a74f8fcf9053195d226b24a08"},
{file = "Pygments-2.7.3.tar.gz", hash = "sha256:ccf3acacf3782cbed4a989426012f1c535c9a90d3a7fc3f16d231b9372d2b716"},
]
pyparsing = [
{file = "pyparsing-2.4.7-py2.py3-none-any.whl", hash = "sha256:ef9d7589ef3c200abe66653d3f1ab1033c3c419ae9b9bdb1240a85b024efc88b"},
{file = "pyparsing-2.4.7.tar.gz", hash = "sha256:c203ec8783bf771a155b207279b9bccb8dea02d8f0c9e5f8ead507bc3246ecc1"},
]
pyreadline = [
{file = "pyreadline-2.1.win-amd64.exe", hash = "sha256:9ce5fa65b8992dfa373bddc5b6e0864ead8f291c94fbfec05fbd5c836162e67b"},
{file = "pyreadline-2.1.win32.exe", hash = "sha256:65540c21bfe14405a3a77e4c085ecfce88724743a4ead47c66b84defcf82c32e"},
@ -261,6 +391,10 @@ pyreadline = [
pyrepl = [
{file = "pyrepl-0.9.0.tar.gz", hash = "sha256:292570f34b5502e871bbb966d639474f2b57fbfcd3373c2d6a2f3d56e681a775"},
]
pytest = [
{file = "pytest-6.1.2-py3-none-any.whl", hash = "sha256:4288fed0d9153d9646bfcdf0c0428197dba1ecb27a33bb6e031d002fa88653fe"},
{file = "pytest-6.1.2.tar.gz", hash = "sha256:c0a7e94a8cdbc5422a51ccdad8e6f1024795939cc89159a0ae7f0b316ad3823e"},
]
pyyaml = [
{file = "PyYAML-5.3.1-cp27-cp27m-win32.whl", hash = "sha256:74809a57b329d6cc0fdccee6318f44b9b8649961fa73144a98735b0aaf029f1f"},
{file = "PyYAML-5.3.1-cp27-cp27m-win_amd64.whl", hash = "sha256:240097ff019d7c70a4922b6869d8a86407758333f02203e0fc6ff79c5dcede76"},

1
pyproject.toml
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@ -12,6 +12,7 @@ pdbpp = "^0.10.2"
[tool.poetry.dev-dependencies]
pre-commit = "^2.9.2"
pytest = "^6.1.2"
[build-system]
requires = ["poetry-core>=1.0.0"]