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3835c4822a
### Summary This PR makes small readability and maintainability improvements to the algorithm implementation. ### Changes - Removed a redundant `n < 0` validation check since the method contract already ensures valid `n` - Replaced `current.remove(current.size() - 1)` with `current.removeLast()` to better express backtracking intent ### Rationale - Simplifies input validation without changing behavior - Uses the `Deque` API to make the backtracking step clearer and less error-prone ### Impact - No change in algorithm logic or time/space complexity - Output remains identical Co-authored-by: Swati Vusurumarthi <swativs869@gmail.com>
The Algorithms - Java
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All algorithms are implemented in Java (for educational purposes)
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