1 files changed, 3 insertions, 1 deletions
diff --git a/4.py b/4.py
index dfd7468..04f645f 100644
--- a/4.py
+++ b/4.py
@@ -1,6 +1,8 @@
+# pyright: strict
 from dataclasses import dataclass
 from functools import cache
 from sys import stdin
+from typing import Type
 
 
 @dataclass(frozen=True)
@@ -14,7 +16,7 @@ class Card:
         return len(self.winning & self.have)
 
     @classmethod
-    def from_str(cls, s: str):
+    def from_str[T](cls: Type[T], s: str) -> T:
         card, rest = s.split(": ")
         _, card_id = card.split()
         winning, have = rest.split(" | ")