Add a guard rail around Roman.i2r

leetcode/stuff.py

@@ -102,6 +102,9 @@ class Roman:
 
     @classmethod
     def i2r(cls, i: int) -> str:
+        if i > 100_000:
+            raise ValueError(f"{i} is too silly")
+
         r: list[str] = []
 
         for int_val, roman_val in sorted(cls.ALL_REVERSE.items(), reverse=True):