* Generic type hint in DDL
Instead of forcing int
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* Add initial version of file for the Euler project problem 136 solution.
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* Fix bug in multi-threading
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* Update prefix_sum.py
Index Validation for get_sum
Raises ValueError if start or end is out of range or start > end.
Handles cases where the array is empty.
✅ Empty Array Support
If an empty array is passed, get_sum raises an appropriate error instead of failing unexpectedly.
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* Fix And Add power.py
To fix the inaccuracies and allow handling of negative exponents and bases, the key issue lies in how negative numbers are handled in the power calculation, especially when dividing.
## Example Output:
```python
>>> power(4, 6)
4096
>>> power(2, 3)
8
>>> power(-2, 3)
-8
>>> power(2, -3)
0.125
>>> power(-2, -3)
-0.125
```
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* The string manipulation - replace()
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* Fix leap year check
Replace `!=` in `(year % 400) != 0` (line 49) with `==`
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