Recusive solution that uses O(n2) memory. A more memory effienct solution would use global state to flag which letters have been used while deeper in the call stack. I opted for a more functional solution without global state.
In C#:
Recusive solution that uses O(n2) memory. A more memory effienct solution would use global state to flag which letters have been used while deeper in the call stack. I opted for a more functional solution without global state.
In C#:
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