[py] Port 2017_01

py/aoc/__init__.py

@@ -2,12 +2,14 @@ import sys
 import argparse
 from pathlib import Path
 
+from .y2017 import d01
 from .y2018 import d01, d02, d03, d04, d05, d06, d07, d08, d09, d10, d11
 from .y2020 import d10
 from .y2021 import d14
 from .y2022 import d01, d02, d03, d04, d05, d06
 
 DAYS = {
+    "2017_01": y2017.d01.solve,
     "2018_01": y2018.d01.solve,
     "2018_02": y2018.d02.solve,
     "2018_03": y2018.d03.solve,

py/aoc/y2017/d01.py

@@ -0,0 +1,34 @@
+def load_line(inputstr):
+    return list(map(int, inputstr[:-1]))
+
+
+# PART 1
+
+
+def sum_matching(digits):
+    offset = digits[1:] + digits
+    total = 0
+    for x, y in zip(digits, offset):
+        if x == y:
+            total += x
+    return total
+
+
+# PART 2
+
+
+def sum_matching_2(digits):
+    offset = digits[len(digits) // 2 :] + digits
+    total = 0
+    for x, y in zip(digits, offset):
+        if x == y:
+            total += x
+    return total
+
+
+def solve(inputstr):
+    digits = load_line(inputstr)
+    total = sum_matching(digits)
+    print(f"Part 1: {total}")
+    total_2 = sum_matching_2(digits)
+    print(f"Part 2: {total_2}")