[py] Port 2017_02

py/aoc/__init__.py

@@ -2,7 +2,7 @@ import sys
 import argparse
 from pathlib import Path
 
-from .y2017 import d01
+from .y2017 import d01, d02
 from .y2018 import d01, d02, d03, d04, d05, d06, d07, d08, d09, d10, d11
 from .y2020 import d10
 from .y2021 import d14
@@ -10,6 +10,7 @@ from .y2022 import d01, d02, d03, d04, d05, d06
 
 DAYS = {
     "2017_01": y2017.d01.solve,
+    "2017_02": y2017.d02.solve,
     "2018_01": y2018.d01.solve,
     "2018_02": y2018.d02.solve,
     "2018_03": y2018.d03.solve,

py/aoc/y2017/d02.py

@@ -0,0 +1,42 @@
+def load_rows(inputstr):
+    rows = []
+    for line in inputstr.splitlines():
+        digits = line.split("\t")
+        row = list(map(int, digits))
+        rows.append(row)
+    return rows
+
+
+# PART 1
+
+
+def checksum(rows):
+    total = 0
+    for row in rows:
+        total += max(row) - min(row)
+    return total
+
+
+# PART 2
+
+
+def divide_evenly(row):
+    for a in row:
+        for b in row:
+            if a != b and a % b == 0:
+                return a // b
+
+
+def checksum_even(rows):
+    total = 0
+    for row in rows:
+        total += divide_evenly(row)
+    return total
+
+
+def solve(inputstr):
+    rows = load_rows(inputstr)
+    check = checksum(rows)
+    print(f"Part 1: {check}")
+    check_even = checksum_even(rows)
+    print(f"Part 2: {check_even}")