AoC: And we're (tentatively) off

2024/common/common.py

@@ -0,0 +1,22 @@
+import os, sys
+
+# Returns the lines of the file, ready to iterate over.
+# Returns error if the file is empty.
+# Usage:
+# my_lines = open_file("input.txt")
+def open_file(filename):
+    file_path = os.path.join(os.path.dirname(os.path.realpath(sys.argv[0])),filename)
+    if os.stat(file_path).st_size == 0:
+        print("\n❌ File " + filename + " is empty!")
+        sys.exit()
+    file = open(file_path, 'r')
+    return file.readlines()
+
+# Prints the answer, and (if there's an expected value to check) verifies the answer.
+def print_and_verify_answer(mode, part, answer, expected):
+    print("\nPart " + part + " " + mode + " answer: " + str(answer))
+    if expected != None:
+        if answer != expected:
+            print("❌ FAILED! Expected", expected, "got", answer)
+        else:
+            print("✅ Output matches expected value")

2024/day01/day01.py

@@ -0,0 +1,37 @@
+import sys, os
+sys.path.append(os.path.join(os.path.dirname(__file__), '..', 'common'))
+from common import open_file, print_and_verify_answer
+
+def construct_and_sort_lists(data_file):
+    list_one = []
+    list_two = []
+    for line in data_file:
+        numbers = line.split()
+        list_one.append(int(numbers[0]))
+        list_two.append(int(numbers[1]))
+    return list_one, list_two
+
+def run_part_one(mode, expected = None):
+    data_file = open_file( mode + ".txt")
+    list_one, list_two = construct_and_sort_lists(data_file)
+    total_difference = 0
+    list_one.sort()
+    list_two.sort()
+    for i in range(len(list_one)):
+        total_difference += abs(list_one[i] - list_two[i])
+    print_and_verify_answer(mode, "one", total_difference, expected)
+
+def run_part_two(mode, expected = None):
+    data_file = open_file( mode + ".txt")
+    list_one, list_two = construct_and_sort_lists(data_file)
+    running_total = 0
+    for i in range(len(list_one)):
+        running_total += list_two.count(list_one[i]) * list_one[i]
+    print_and_verify_answer(mode, "two", running_total, expected)
+
+# ADD EXPECTED OUTPUTS TO TESTS HERE 👇
+run_part_one("test", 11)
+run_part_one("prod", 2066446)
+run_part_two("test", 31)
+run_part_two("prod", 24931009)
+# Now run it and watch the magic happen 🪄

2024/day01/test.txt

@@ -0,0 +1,6 @@
+3   4
+4   3
+2   5
+1   3
+3   9
+3   3

README.md

@@ -15,6 +15,7 @@ Started in 2022, but I'll backfill previous years when I need a festive boost.
 ⬜ = incomplete or not attempted  
 
 ### Stats
+**2024:**  🟧⬜⬜⬜⬜⬜⬜⬜⬜⬜⬜⬜⬜⬜⬜⬜⬜⬜⬜⬜⬜⬜⬜⬜⬜ _(2)_
 **2023:**  🟨🟨🟨🟨🟧🟨🟨🟧⬜⬜⬜⬜⬜⬜⬜⬜⬜⬜⬜⬜⬜⬜⬜⬜⬜ _(16)_  
 **2022:**  🟨🟨🟨🟨🟨🟨🟨🟨🟨🟨🟨🟧🟨🟨⬛⬜⬜⬛⬜⬛🟨⬜🟨⬜⬛ _(36)_  
 **2021:**  🟨🟨🟨🟨🟨🟨🟨🟨⬜⬜⬜⬜⬜⬜⬜⬜⬜⬜⬜⬜⬜⬜⬜⬜⬜ _(16)_