From 020404c51f3d009cad38d4887a0815d160bee042 Mon Sep 17 00:00:00 2001 From: Luc Rubio Date: Sun, 1 Dec 2024 21:29:22 +0100 Subject: [PATCH] AoC 2024: day 1 --- README.md | 2 + aoc2024/README.md | 7 + aoc2024/__init__.py | 0 aoc2024/src/__init__.py | 0 aoc2024/src/day01/__init__.py | 0 aoc2024/src/day01/python/__init__.py | 0 aoc2024/src/day01/python/solution.py | 77 ++ aoc2024/test/__init__.py | 0 aoc2024/test/day01/__init__.py | 0 aoc2024/test/day01/python/__init__.py | 0 aoc2024/test/day01/python/example1.txt | 6 + aoc2024/test/day01/python/input.txt | 1000 ++++++++++++++++++++ aoc2024/test/day01/python/test_solution.py | 38 + 13 files changed, 1130 insertions(+) create mode 100644 aoc2024/README.md create mode 100644 aoc2024/__init__.py create mode 100644 aoc2024/src/__init__.py create mode 100644 aoc2024/src/day01/__init__.py create mode 100644 aoc2024/src/day01/python/__init__.py create mode 100644 aoc2024/src/day01/python/solution.py create mode 100644 aoc2024/test/__init__.py create mode 100644 aoc2024/test/day01/__init__.py create mode 100644 aoc2024/test/day01/python/__init__.py create mode 100644 aoc2024/test/day01/python/example1.txt create mode 100644 aoc2024/test/day01/python/input.txt create mode 100644 aoc2024/test/day01/python/test_solution.py diff --git a/README.md b/README.md index 51aef61..4d52617 100644 --- a/README.md +++ b/README.md @@ -16,3 +16,5 @@ My own solutions to [Advent of Code](https://adventofcode.com/). → [solutions in Python 3](https://github.com/loociano/advent-of-code/tree/master/aoc2022) * [Advent of Code 2023](https://adventofcode.com/2023) → [solutions in Python 3](https://github.com/loociano/advent-of-code/tree/master/aoc2023) +* [Advent of Code 2024](https://adventofcode.com/2024) + → [solutions in Python 3](https://github.com/loociano/advent-of-code/tree/master/aoc2024) diff --git a/aoc2024/README.md b/aoc2024/README.md new file mode 100644 index 0000000..2c7687a --- /dev/null +++ b/aoc2024/README.md @@ -0,0 +1,7 @@ +# Advent of Code 2024 + +My own solutions to [Advent of Code 2024](https://adventofcode.com/2024). + +> Advent of Code is an Advent calendar of small programming puzzles for a variety of skill sets and skill levels that can be solved in any programming language you like. People use them as a speed contest, interview prep, company training, university coursework, practice problems, or to challenge each other. —Eric Wastl + +* [Day 1: Historian Hysteria](https://adventofcode.com/2023/day/1) → [Python3 solution](https://github.com/loociano/advent-of-code/blob/master/aoc2024/src/day01/python/solution.py) \ No newline at end of file diff --git a/aoc2024/__init__.py b/aoc2024/__init__.py new file mode 100644 index 0000000..e69de29 diff --git a/aoc2024/src/__init__.py b/aoc2024/src/__init__.py new file mode 100644 index 0000000..e69de29 diff --git a/aoc2024/src/day01/__init__.py b/aoc2024/src/day01/__init__.py new file mode 100644 index 0000000..e69de29 diff --git a/aoc2024/src/day01/python/__init__.py b/aoc2024/src/day01/python/__init__.py new file mode 100644 index 0000000..e69de29 diff --git a/aoc2024/src/day01/python/solution.py b/aoc2024/src/day01/python/solution.py new file mode 100644 index 0000000..6674092 --- /dev/null +++ b/aoc2024/src/day01/python/solution.py @@ -0,0 +1,77 @@ +# Copyright 2024 Google LLC +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# https://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. +from collections import defaultdict +from typing import Sequence + +type LocationIds = Sequence[int] + +def _parse_input(input: Sequence[str]) -> tuple[LocationIds, LocationIds]: + """Converts puzzle input into 2 lists of location IDs. + + n = len(input) + Time complexity: O(n) + Space complexity: O(n) + O(n) = O(n) + + """ + location_ids1 = [] + location_ids2 = [] + # Parse input: + for line in input: # t:O(n) + # Line format is: '\s\s\s' + id1, id2 = map(int, line.split(' ')) # Assumes valid input. + location_ids1.append(id1) + location_ids2.append(id2) + return location_ids1, location_ids2 + +def calculate_distance(input: Sequence[str]) -> int: + """ + Calculates total distance between 2 sequences of location IDs. + + n = len(input) + Time complexity: O(n) + O(2nlogn) + O(n) = O(nlogn). + Space complexity: O(n) + O(n) = O(n) + + Args: + input: Sequence of location ID pairs. + Returns + Total distance. + """ + location_ids1, location_ids2 = _parse_input(input) # O(n) + # Calculate total distance: + location_ids1.sort() # t:O(nlogn) + location_ids2.sort() # t:O(nlogn) + return sum( + abs(location_ids1[i] - location_ids2[i]) + for i in range(0, len(location_ids1))) # t:O(n) + +def calculate_similarity_score(input: Sequence[str]) -> int: + """ + Calculates similarity score between 2 sequences of location IDs. + + n = len(input) + Time complexity: O(n) + O(n) + O(n) = O(n) + Space complexity: O(2n) + O(n) = O(n) + + Args: + input: Sequence of location ID pairs. + Returns + Total distance. + """ + location_ids1, location_ids2 = _parse_input(input) # t:O(n) + histogram = defaultdict(int) + # Generate histogram: + for id in location_ids2: # t:O(n) + histogram[id] += 1 + # Calculate similarity score: + return sum(id * histogram.get(id, 0) for id in location_ids1) # t:O(n) \ No newline at end of file diff --git a/aoc2024/test/__init__.py b/aoc2024/test/__init__.py new file mode 100644 index 0000000..e69de29 diff --git a/aoc2024/test/day01/__init__.py b/aoc2024/test/day01/__init__.py new file mode 100644 index 0000000..e69de29 diff --git a/aoc2024/test/day01/python/__init__.py b/aoc2024/test/day01/python/__init__.py new file mode 100644 index 0000000..e69de29 diff --git a/aoc2024/test/day01/python/example1.txt b/aoc2024/test/day01/python/example1.txt new file mode 100644 index 0000000..dfca0b1 --- /dev/null +++ b/aoc2024/test/day01/python/example1.txt @@ -0,0 +1,6 @@ +3 4 +4 3 +2 5 +1 3 +3 9 +3 3 \ No newline at end of file diff --git a/aoc2024/test/day01/python/input.txt b/aoc2024/test/day01/python/input.txt new file mode 100644 index 0000000..7be7da0 --- /dev/null +++ b/aoc2024/test/day01/python/input.txt @@ -0,0 +1,1000 @@ +68878 98732 +24519 87903 +73275 70114 +87985 89419 +80485 75440 +98994 55979 +28041 41805 +50762 92905 +23796 72412 +71699 84915 +43168 71645 +12985 96078 +38491 34431 +30867 76208 +89794 10790 +59797 86225 +62401 50098 +90230 45208 +40596 36238 +52821 75949 +61994 85771 +62756 70340 +91145 33842 +57051 45050 +36257 80983 +36465 84670 +98498 23292 +49344 50098 +13100 22817 +82572 57598 +77578 36555 +99900 91029 +75949 26486 +50711 74711 +52402 27513 +69977 71045 +23803 41588 +57399 16399 +81372 45126 +98985 10547 +76606 99481 +86993 78240 +54958 27513 +23734 61444 +25189 10790 +11983 91029 +53266 91029 +31226 16399 +54686 86915 +60013 40760 +29568 52436 +97354 44827 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+93712 91171 +73589 30084 +91733 49842 +55558 37212 +11506 83025 +59048 71853 +62575 73247 +96799 92730 +46068 93958 +32722 12454 +42557 26234 +83134 54811 +52665 73128 +38085 69964 +33365 22988 +74033 87903 +49743 38491 +47311 92414 +41588 38093 +78063 48550 +83201 80983 +57980 35192 +58451 71130 +81627 56209 \ No newline at end of file diff --git a/aoc2024/test/day01/python/test_solution.py b/aoc2024/test/day01/python/test_solution.py new file mode 100644 index 0000000..1140a3d --- /dev/null +++ b/aoc2024/test/day01/python/test_solution.py @@ -0,0 +1,38 @@ +# Copyright 2024 Google LLC +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# https://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. +import unittest + +from aoc2024.src.day01.python.solution import calculate_distance, calculate_similarity_score +from common.python3.AdventOfCodeTestCase import AdventOfCodeTestCase + + +class TestDay01Solution(AdventOfCodeTestCase): + def __init__(self, *args, **kwargs): + super(TestDay01Solution, self).__init__(__file__, *args, **kwargs) + + def test_part1_withExample_calculatesDistance(self): + self.assertEqual(11, calculate_distance(self.examples[0])) + + def test_part1_withPuzzleInput_calculatesDistance(self): + self.assertEqual(1834060, calculate_distance(self.input)) + + def test_part2_withExample_calculatesSimilarityScore(self): + self.assertEqual(31, calculate_similarity_score(self.examples[0])) + + def test_part2_withPuzzleInput_calculatesSimilarityScore(self): + self.assertEqual(21607792, calculate_similarity_score(self.input)) + + +if __name__ == '__main__': + unittest.main()