diff --git a/2019/d03/ex2/ex2.py b/2019/d03/ex2/ex2.py
index a0abfac..077f2e3 100755
--- a/2019/d03/ex2/ex2.py
+++ b/2019/d03/ex2/ex2.py
@@ -2,7 +2,7 @@
 
 import sys
 from fractions import Fraction
-from typing import Dict, List, NamedTuple, Optional
+from typing import List, NamedTuple, Optional
 
 
 class Point(NamedTuple):
diff --git a/2019/d05/ex1/ex1.py b/2019/d05/ex1/ex1.py
index 09dac02..fe46167 100755
--- a/2019/d05/ex1/ex1.py
+++ b/2019/d05/ex1/ex1.py
@@ -1,7 +1,5 @@
 #!/usr/bin/env python
 
-import sys
-from copy import deepcopy
 from enum import IntEnum
 from typing import List, NamedTuple
 
diff --git a/2019/d07/ex2/ex2.py b/2019/d07/ex2/ex2.py
index c239eaa..8f5e209 100755
--- a/2019/d07/ex2/ex2.py
+++ b/2019/d07/ex2/ex2.py
@@ -5,7 +5,7 @@ import sys
 from copy import deepcopy
 from dataclasses import dataclass, field
 from enum import IntEnum
-from typing import Callable, List, NamedTuple
+from typing import List, NamedTuple
 
 
 class ParameterMode(IntEnum):
diff --git a/2019/d09/ex1/ex1.py b/2019/d09/ex1/ex1.py
index 6f54dec..9a2df1e 100755
--- a/2019/d09/ex1/ex1.py
+++ b/2019/d09/ex1/ex1.py
@@ -1,11 +1,10 @@
 #!/usr/bin/env python
 
-import itertools
 import sys
 from copy import deepcopy
 from dataclasses import dataclass, field
 from enum import IntEnum
-from typing import Callable, List, NamedTuple
+from typing import List, NamedTuple
 
 
 class ParameterMode(IntEnum):
diff --git a/2019/d09/ex2/ex2.py b/2019/d09/ex2/ex2.py
index 598f628..7c8be67 100755
--- a/2019/d09/ex2/ex2.py
+++ b/2019/d09/ex2/ex2.py
@@ -1,11 +1,10 @@
 #!/usr/bin/env python
 
-import itertools
 import sys
 from copy import deepcopy
 from dataclasses import dataclass, field
 from enum import IntEnum
-from typing import Callable, List, NamedTuple
+from typing import List, NamedTuple
 
 
 class ParameterMode(IntEnum):
diff --git a/2019/d10/ex2/ex2.py b/2019/d10/ex2/ex2.py
index 60f115a..480234e 100755
--- a/2019/d10/ex2/ex2.py
+++ b/2019/d10/ex2/ex2.py
@@ -4,7 +4,6 @@ import sys
 from cmath import phase
 from itertools import groupby
 from math import gcd, pi
-from pprint import pprint
 from typing import NamedTuple, Set, Tuple
 
 
diff --git a/2019/d13/ex1/ex1.py b/2019/d13/ex1/ex1.py
index 1bf7e8c..924ffb7 100755
--- a/2019/d13/ex1/ex1.py
+++ b/2019/d13/ex1/ex1.py
@@ -3,7 +3,7 @@
 import sys
 from dataclasses import dataclass, field
 from enum import IntEnum
-from typing import Dict, Iterable, List, NamedTuple, Tuple, TypeVar
+from typing import Iterable, List, NamedTuple, Tuple, TypeVar
 
 
 class ParameterMode(IntEnum):
diff --git a/2019/d13/ex2/ex2.py b/2019/d13/ex2/ex2.py
index 9fb669f..af0d24f 100755
--- a/2019/d13/ex2/ex2.py
+++ b/2019/d13/ex2/ex2.py
@@ -3,7 +3,7 @@
 import sys
 from dataclasses import dataclass, field
 from enum import IntEnum
-from typing import Dict, Iterable, List, NamedTuple, Tuple, TypeVar
+from typing import Iterable, List, NamedTuple, Tuple, TypeVar
 
 
 class ParameterMode(IntEnum):
diff --git a/2019/d16/ex2/ex2.py b/2019/d16/ex2/ex2.py
index a13a0bf..317d157 100755
--- a/2019/d16/ex2/ex2.py
+++ b/2019/d16/ex2/ex2.py
@@ -2,8 +2,6 @@
 
 import sys
 from functools import reduce
-from itertools import chain, cycle
-from typing import Iterable, List
 
 
 def main() -> None:
diff --git a/2019/d19/ex2/ex2.py b/2019/d19/ex2/ex2.py
index 138e45b..8dd132c 100755
--- a/2019/d19/ex2/ex2.py
+++ b/2019/d19/ex2/ex2.py
@@ -4,7 +4,7 @@ import sys
 from copy import deepcopy
 from dataclasses import dataclass, field
 from enum import IntEnum
-from typing import Iterator, List, NamedTuple, Tuple
+from typing import List, NamedTuple
 
 
 class ParameterMode(IntEnum):
diff --git a/2020/d07/ex2/ex2.py b/2020/d07/ex2/ex2.py
index 107d737..a955087 100755
--- a/2020/d07/ex2/ex2.py
+++ b/2020/d07/ex2/ex2.py
@@ -2,8 +2,6 @@
 
 import re
 import sys
-from collections import defaultdict
-from copy import deepcopy
 from dataclasses import dataclass
 from typing import Dict, List, Set, Tuple
 
diff --git a/2020/d18/ex2/ex2.py b/2020/d18/ex2/ex2.py
index 94f13ed..a83161c 100755
--- a/2020/d18/ex2/ex2.py
+++ b/2020/d18/ex2/ex2.py
@@ -1,7 +1,7 @@
 #!/usr/bin/env python
 
 import sys
-from typing import Callable, Dict, List
+from typing import List
 
 """
 E : T [ * T ]*
diff --git a/2020/d20/ex2/ex2.py b/2020/d20/ex2/ex2.py
index e923806..c9e06a7 100755
--- a/2020/d20/ex2/ex2.py
+++ b/2020/d20/ex2/ex2.py
@@ -5,7 +5,6 @@ import itertools
 import math
 import sys
 from collections import defaultdict
-from copy import deepcopy
 from typing import Dict, Iterator, List, Set, Tuple
 
 Tile = List[List[str]]
diff --git a/2020/d23/ex1/ex1.py b/2020/d23/ex1/ex1.py
index faae133..2d7ff20 100755
--- a/2020/d23/ex1/ex1.py
+++ b/2020/d23/ex1/ex1.py
@@ -2,7 +2,7 @@
 
 import itertools
 import sys
-from typing import List, Tuple
+from typing import List
 
 
 def solve(circle: List[int]) -> int:
diff --git a/2020/d23/ex2/ex2.py b/2020/d23/ex2/ex2.py
index 90c8c81..8993dcb 100755
--- a/2020/d23/ex2/ex2.py
+++ b/2020/d23/ex2/ex2.py
@@ -2,7 +2,7 @@
 
 import itertools
 import sys
-from typing import List, Tuple
+from typing import List
 
 
 def solve(circle: List[int]) -> int:
diff --git a/2020/d24/ex2/ex2.py b/2020/d24/ex2/ex2.py
index 17728b2..ef749f9 100755
--- a/2020/d24/ex2/ex2.py
+++ b/2020/d24/ex2/ex2.py
@@ -3,7 +3,6 @@
 import itertools
 import sys
 from collections import defaultdict
-from copy import deepcopy
 from typing import Dict, Iterator, List, Tuple
 
 Offset = Tuple[int, int]
diff --git a/2021/d01/ex1/ex1.py b/2021/d01/ex1/ex1.py
index 24cc5d1..3853ce4 100755
--- a/2021/d01/ex1/ex1.py
+++ b/2021/d01/ex1/ex1.py
@@ -1,6 +1,5 @@
 #!/usr/bin/env python
 
-import itertools
 import sys
 from typing import List
 
diff --git a/2021/d02/ex1/ex1.py b/2021/d02/ex1/ex1.py
index f28dd77..f891b43 100755
--- a/2021/d02/ex1/ex1.py
+++ b/2021/d02/ex1/ex1.py
@@ -1,6 +1,5 @@
 #!/usr/bin/env python
 
-import itertools
 import sys
 from typing import List
 
diff --git a/2021/d02/ex2/ex2.py b/2021/d02/ex2/ex2.py
index b48215c..8843639 100755
--- a/2021/d02/ex2/ex2.py
+++ b/2021/d02/ex2/ex2.py
@@ -1,6 +1,5 @@
 #!/usr/bin/env python
 
-import itertools
 import sys
 from typing import List
 
diff --git a/2021/d03/ex1/ex1.py b/2021/d03/ex1/ex1.py
index ed2eeb7..7519004 100755
--- a/2021/d03/ex1/ex1.py
+++ b/2021/d03/ex1/ex1.py
@@ -1,6 +1,5 @@
 #!/usr/bin/env python
 
-import itertools
 import sys
 from typing import List
 
diff --git a/2021/d03/ex2/ex2.py b/2021/d03/ex2/ex2.py
index 9c6515b..acf0ff2 100755
--- a/2021/d03/ex2/ex2.py
+++ b/2021/d03/ex2/ex2.py
@@ -1,6 +1,5 @@
 #!/usr/bin/env python
 
-import itertools
 import sys
 from copy import deepcopy
 from typing import List
diff --git a/2021/d06/ex1/ex1.py b/2021/d06/ex1/ex1.py
index 5eec9ce..65abb44 100755
--- a/2021/d06/ex1/ex1.py
+++ b/2021/d06/ex1/ex1.py
@@ -3,7 +3,6 @@
 import itertools
 import sys
 from collections import Counter
-from dataclasses import dataclass
 from typing import Iterator, List, TypeVar
 
 T = TypeVar("T")
diff --git a/2021/d06/ex2/ex2.py b/2021/d06/ex2/ex2.py
index 2e64423..bb40805 100755
--- a/2021/d06/ex2/ex2.py
+++ b/2021/d06/ex2/ex2.py
@@ -3,7 +3,6 @@
 import itertools
 import sys
 from collections import Counter
-from dataclasses import dataclass
 from typing import Iterator, List, TypeVar
 
 T = TypeVar("T")
diff --git a/2021/d07/ex1/ex1.py b/2021/d07/ex1/ex1.py
index 4205009..2b8a8a9 100755
--- a/2021/d07/ex1/ex1.py
+++ b/2021/d07/ex1/ex1.py
@@ -1,6 +1,5 @@
 #!/usr/bin/env python
 
-import itertools
 import sys
 from typing import List
 
diff --git a/2021/d07/ex2/ex2.py b/2021/d07/ex2/ex2.py
index 56b818c..8eec5ef 100755
--- a/2021/d07/ex2/ex2.py
+++ b/2021/d07/ex2/ex2.py
@@ -1,6 +1,5 @@
 #!/usr/bin/env python
 
-import itertools
 import sys
 from math import ceil, floor
 from typing import List
diff --git a/2021/d08/ex2/ex2.py b/2021/d08/ex2/ex2.py
index 1553e29..c22b23b 100755
--- a/2021/d08/ex2/ex2.py
+++ b/2021/d08/ex2/ex2.py
@@ -1,6 +1,5 @@
 #!/usr/bin/env python
 
-import itertools
 import sys
 from dataclasses import dataclass
 from typing import Dict, List, Set
diff --git a/2021/d09/ex1/ex1.py b/2021/d09/ex1/ex1.py
index cf7d7d6..e84e893 100755
--- a/2021/d09/ex1/ex1.py
+++ b/2021/d09/ex1/ex1.py
@@ -1,6 +1,5 @@
 #!/usr/bin/env python
 
-import itertools
 import sys
 from typing import Iterator, List, Tuple
 
diff --git a/2021/d09/ex2/ex2.py b/2021/d09/ex2/ex2.py
index 451883a..0311995 100755
--- a/2021/d09/ex2/ex2.py
+++ b/2021/d09/ex2/ex2.py
@@ -1,6 +1,5 @@
 #!/usr/bin/env python
 
-import itertools
 import sys
 from typing import Iterator, List, Tuple
 
diff --git a/2021/d10/ex1/ex1.py b/2021/d10/ex1/ex1.py
index 4667d43..6770222 100755
--- a/2021/d10/ex1/ex1.py
+++ b/2021/d10/ex1/ex1.py
@@ -1,6 +1,5 @@
 #!/usr/bin/env python
 
-import itertools
 import sys
 from typing import List, Optional, cast
 
diff --git a/2021/d10/ex2/ex2.py b/2021/d10/ex2/ex2.py
index 27de8ac..d100b0f 100755
--- a/2021/d10/ex2/ex2.py
+++ b/2021/d10/ex2/ex2.py
@@ -1,6 +1,5 @@
 #!/usr/bin/env python
 
-import itertools
 import sys
 from typing import Iterator, List, Optional
 
diff --git a/2021/d11/ex1/ex1.py b/2021/d11/ex1/ex1.py
index 619bd27..c6bf0be 100755
--- a/2021/d11/ex1/ex1.py
+++ b/2021/d11/ex1/ex1.py
@@ -2,7 +2,6 @@
 
 import itertools
 import sys
-from copy import deepcopy
 from typing import Iterator, List, Set, Tuple
 
 Grid = List[List[int]]
diff --git a/2021/d11/ex2/ex2.py b/2021/d11/ex2/ex2.py
index d4ce118..8f95f55 100755
--- a/2021/d11/ex2/ex2.py
+++ b/2021/d11/ex2/ex2.py
@@ -2,7 +2,6 @@
 
 import itertools
 import sys
-from copy import deepcopy
 from typing import Iterator, List, Set, Tuple
 
 Grid = List[List[int]]
diff --git a/2021/d12/ex1/ex1.py b/2021/d12/ex1/ex1.py
index 1887c7d..6108876 100755
--- a/2021/d12/ex1/ex1.py
+++ b/2021/d12/ex1/ex1.py
@@ -1,6 +1,5 @@
 #!/usr/bin/env python
 
-import itertools
 import sys
 from collections import defaultdict
 from typing import Dict, List, Set
diff --git a/2021/d12/ex2/ex2.py b/2021/d12/ex2/ex2.py
index bc5a527..b30d9b8 100755
--- a/2021/d12/ex2/ex2.py
+++ b/2021/d12/ex2/ex2.py
@@ -1,6 +1,5 @@
 #!/usr/bin/env python
 
-import itertools
 import sys
 from collections import defaultdict
 from typing import Dict, List, Set
diff --git a/2021/d15/ex1/ex1.py b/2021/d15/ex1/ex1.py
index d7c5e88..4399aba 100755
--- a/2021/d15/ex1/ex1.py
+++ b/2021/d15/ex1/ex1.py
@@ -1,9 +1,8 @@
 #!/usr/bin/env python
 
 import heapq
-import itertools
 import sys
-from typing import Iterator, List, NamedTuple, Set, Tuple
+from typing import Iterator, List, NamedTuple, Set
 
 
 class Point(NamedTuple):
diff --git a/2021/d15/ex2/ex2.py b/2021/d15/ex2/ex2.py
index 0fa89b8..c2bbd30 100755
--- a/2021/d15/ex2/ex2.py
+++ b/2021/d15/ex2/ex2.py
@@ -1,9 +1,8 @@
 #!/usr/bin/env python
 
 import heapq
-import itertools
 import sys
-from typing import Iterator, List, NamedTuple, Set, Tuple
+from typing import Iterator, List, NamedTuple, Set
 
 
 class Point(NamedTuple):
diff --git a/2021/d16/ex1/ex1.py b/2021/d16/ex1/ex1.py
index d65fec5..1978196 100755
--- a/2021/d16/ex1/ex1.py
+++ b/2021/d16/ex1/ex1.py
@@ -5,7 +5,7 @@ import functools
 import itertools
 import sys
 from dataclasses import dataclass
-from typing import Iterable, Iterator, List, Tuple, TypeVar
+from typing import Iterable, Iterator, List, Tuple
 
 RawPacket = List[bool]
 
diff --git a/2021/d16/ex2/ex2.py b/2021/d16/ex2/ex2.py
index 7ecb73a..bb9ad4e 100755
--- a/2021/d16/ex2/ex2.py
+++ b/2021/d16/ex2/ex2.py
@@ -6,7 +6,7 @@ import itertools
 import math
 import sys
 from dataclasses import dataclass
-from typing import Callable, Dict, Iterable, Iterator, List, Tuple, TypeVar
+from typing import Callable, Dict, Iterable, Iterator, List, Tuple
 
 RawPacket = List[bool]
 
diff --git a/2021/d17/ex1/ex1.py b/2021/d17/ex1/ex1.py
index d58a72e..00bbca2 100755
--- a/2021/d17/ex1/ex1.py
+++ b/2021/d17/ex1/ex1.py
@@ -1,7 +1,6 @@
 #!/usr/bin/env python
 
 import itertools
-import math
 import sys
 from typing import Iterator, List, NamedTuple
 
diff --git a/2021/d17/ex2/ex2.py b/2021/d17/ex2/ex2.py
index e2beb9a..bc7dab1 100755
--- a/2021/d17/ex2/ex2.py
+++ b/2021/d17/ex2/ex2.py
@@ -1,7 +1,5 @@
 #!/usr/bin/env python
 
-import itertools
-import math
 import sys
 from typing import Iterator, List, NamedTuple
 
diff --git a/2021/d18/ex2/ex2.py b/2021/d18/ex2/ex2.py
index 56c8d48..c0a37a7 100755
--- a/2021/d18/ex2/ex2.py
+++ b/2021/d18/ex2/ex2.py
@@ -1,6 +1,5 @@
 #!/usr/bin/env python
 
-import functools
 import itertools
 import sys
 from copy import deepcopy
diff --git a/2021/d19/ex1/ex1.py b/2021/d19/ex1/ex1.py
index 922e709..e42af3c 100755
--- a/2021/d19/ex1/ex1.py
+++ b/2021/d19/ex1/ex1.py
@@ -1,6 +1,5 @@
 #!/usr/bin/env python
 
-import functools
 import itertools
 import sys
 from dataclasses import dataclass
diff --git a/2021/d19/ex2/ex2.py b/2021/d19/ex2/ex2.py
index 1ad850a..ff4f6ad 100755
--- a/2021/d19/ex2/ex2.py
+++ b/2021/d19/ex2/ex2.py
@@ -1,6 +1,5 @@
 #!/usr/bin/env python
 
-import functools
 import itertools
 import sys
 from dataclasses import dataclass
diff --git a/2021/d22/ex1/ex1.py b/2021/d22/ex1/ex1.py
index 662dd49..dac1513 100755
--- a/2021/d22/ex1/ex1.py
+++ b/2021/d22/ex1/ex1.py
@@ -3,7 +3,7 @@
 import functools
 import itertools
 import sys
-from typing import Iterator, List, NamedTuple, Optional, Set, Tuple, cast
+from typing import List, NamedTuple, Optional, Set, Tuple
 
 
 class Point(NamedTuple):
diff --git a/2021/d22/ex2/ex2.py b/2021/d22/ex2/ex2.py
index 4753b54..3c7d2c5 100755
--- a/2021/d22/ex2/ex2.py
+++ b/2021/d22/ex2/ex2.py
@@ -3,7 +3,7 @@
 import functools
 import itertools
 import sys
-from typing import Iterator, List, NamedTuple, Optional, Set, Tuple, cast
+from typing import List, NamedTuple, Optional, Set, Tuple
 
 
 class Point(NamedTuple):
diff --git a/2021/d23/ex1/ex1.py b/2021/d23/ex1/ex1.py
index 4d585cd..0b99d71 100755
--- a/2021/d23/ex1/ex1.py
+++ b/2021/d23/ex1/ex1.py
@@ -3,7 +3,7 @@
 import enum
 import functools
 import sys
-from typing import Iterator, List, NamedTuple, Optional, Tuple, cast
+from typing import Iterator, List, NamedTuple, Optional, Tuple
 
 
 class Point(NamedTuple):
diff --git a/2021/d23/ex2/ex2.py b/2021/d23/ex2/ex2.py
index 1ea1d8f..8c077d9 100755
--- a/2021/d23/ex2/ex2.py
+++ b/2021/d23/ex2/ex2.py
@@ -3,7 +3,7 @@
 import enum
 import functools
 import sys
-from typing import Iterator, List, NamedTuple, Optional, Tuple, cast
+from typing import Iterator, List, NamedTuple, Optional, Tuple
 
 
 class Point(NamedTuple):
diff --git a/2021/d25/ex1/ex1.py b/2021/d25/ex1/ex1.py
index fe8132c..5d6f612 100755
--- a/2021/d25/ex1/ex1.py
+++ b/2021/d25/ex1/ex1.py
@@ -1,9 +1,8 @@
 #!/usr/bin/env python
 
-import enum
 import itertools
 import sys
-from typing import Iterable, Iterator, List, NamedTuple, Set
+from typing import List, NamedTuple, Set
 
 
 class Point(NamedTuple):
diff --git a/2022/d18/ex2/ex2.py b/2022/d18/ex2/ex2.py
index 6f7bfcb..57f8b5a 100755
--- a/2022/d18/ex2/ex2.py
+++ b/2022/d18/ex2/ex2.py
@@ -2,7 +2,6 @@
 
 import itertools
 import sys
-from collections import deque
 from collections.abc import Iterator
 from typing import NamedTuple
 
diff --git a/2022/d21/ex1/ex1.py b/2022/d21/ex1/ex1.py
index 7c12836..e9c4727 100755
--- a/2022/d21/ex1/ex1.py
+++ b/2022/d21/ex1/ex1.py
@@ -25,7 +25,7 @@ class Operator(str, enum.Enum):
 
 class Monkey:
     def get_value(self, monkeys: dict[str, "Monkey"]) -> int:
-        raise NotImplemented
+        raise NotImplementedError
 
 
 @dataclasses.dataclass
diff --git a/2022/d21/ex2/ex2.py b/2022/d21/ex2/ex2.py
index ec9ca8d..386a187 100755
--- a/2022/d21/ex2/ex2.py
+++ b/2022/d21/ex2/ex2.py
@@ -93,7 +93,7 @@ class MathObserver:
 
 class Monkey:
     def get_value(self, monkeys: dict[str, "Monkey"]) -> Num:
-        raise NotImplemented
+        raise NotImplementedError
 
 
 @dataclasses.dataclass
diff --git a/2023/d02/ex2/ex2.py b/2023/d02/ex2/ex2.py
index 309753e..32c3a34 100755
--- a/2023/d02/ex2/ex2.py
+++ b/2023/d02/ex2/ex2.py
@@ -1,8 +1,6 @@
 #!/usr/bin/env python
 
-import functools
 import math
-import operator as op
 import sys
 from collections import Counter
 from enum import StrEnum
diff --git a/2023/d14/ex2/ex2.py b/2023/d14/ex2/ex2.py
index 090724f..b7b0222 100755
--- a/2023/d14/ex2/ex2.py
+++ b/2023/d14/ex2/ex2.py
@@ -1,6 +1,5 @@
 #!/usr/bin/env python
 
-import dataclasses
 import itertools
 import sys
 from enum import StrEnum
diff --git a/2023/d17/ex2/ex2.py b/2023/d17/ex2/ex2.py
index a643534..f4cfc6e 100755
--- a/2023/d17/ex2/ex2.py
+++ b/2023/d17/ex2/ex2.py
@@ -2,7 +2,6 @@
 
 import functools
 import heapq
-import itertools
 import sys
 from collections.abc import Iterator
 from enum import Enum