y2020

.gitignore

@@ -2,3 +2,4 @@
 __pycache__/
 .DS_Store
 venv/
+.env

makefile

@@ -1,12 +1,15 @@
+include .env
 FILE = $(shell find . -path "./y????/p??.py" -type f | xargs ls -rt | tail -n 1)
 DATA = $(shell echo $(FILE) | sed -e s/\.py/\.dat/)
 PYTHONPATH = .
 export
 
-main: venv/
-	@touch $(DATA)
+main: venv/ $(DATA)
 	@cat $(DATA) | venv/bin/python -u $(FILE)
 
+$(DATA):
+	@echo $(DATA) | venv/bin/python -c "import toolkit; toolkit.get_dat()" $(DATA)
+
 venv/: requirements.txt
 	rm -rf venv/
 	~/.pyenv/versions/3.8.0/bin/python -m venv venv

requirements.txt

@@ -1,2 +1,3 @@
+requests
 flake8
 flake8-import-order

toolkit.py

@@ -1,4 +1,10 @@
 import collections
+import os
+import re
+import sys
+from pathlib import Path
+
+import requests
 
 
 def render(grid, brush=None):
@@ -45,3 +51,13 @@ def shortest_path(start, end, move):
         path.append(end)
         end = seen[end]
     return path[::-1]
+
+
+def get_dat():
+    path = sys.argv[1]
+    year, qn = map(int, re.findall(r'\d+', sys.argv[1]))
+    url = f'https://adventofcode.com/{year}/day/{qn}/input'
+    cookies = {'session': os.environ['SESSION']}
+    response = requests.get(url, cookies=cookies)
+    response.raise_for_status()
+    Path(path).write_bytes(response.content)

y2015/p01.py

@@ -0,0 +1,11 @@
+import sys
+
+
+ans1 = 0
+ans2 = None
+for i, char in enumerate(sys.stdin.read(), 1):
+    ans1 += {'(': 1, ')': -1}[char]
+    if ans1 == -1 and ans2 is None:
+        ans2 = i
+print(ans1)
+print(ans2)

y2020/p01.py

@@ -0,0 +1,15 @@
+import sys
+from itertools import combinations
+
+
+ns = [int(n) for n in sys.stdin.read().splitlines()]
+
+
+for a, b in combinations(ns, 2):
+    if a + b == 2020:
+        print(a * b)
+
+
+for a, b, c in combinations(ns, 3):
+    if a + b + c == 2020:
+        print(a * b * c)

y2020/p02.py

@@ -0,0 +1,4 @@
+import sys
+
+
+sys.stdin.read().splitlines()