séparation de la solution et de l'affichage

day1/part2.py

@@ -1,9 +1,13 @@
 from common import parse, split
 
 
+def solve(l1: list[int], l2: list[int]) -> int:
+    return sum(map(lambda x: x * len(list(filter(lambda y: y == x, l2))), l1))
+
+
 def main():
     l1, l2 = split(parse("input"))
-    print(sum(map(lambda x: x * len(list(filter(lambda y: y == x, l2))), l1)))
+    print(solve(l1, l2))
 
 
 if __name__ == "__main__":