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Computer Science
Posted 3 months ago
a function that takes a string as an input checks the letters of the input and returns a list that contains the characters in the string only once and in alphabetical order.
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Answer from Sia
Posted 3 months ago
The function "unique_sorted_characters" takes a string as input, converts it to a set to remove duplicates, then converts the set to a sorted list, and returns it. The main function "main" tests this function with two use cases to ensure it works as expected.
Step-by-step Instruction
Use a set to remove duplicate characters from the string
Use the `sorted` function to sort the unique characters in alphabetical order
Define the `main` function to test `unique_sorted_characters` with specific use cases
Use assertions to test the correctness of the function with different input strings
Time Complexity
The time complexity of the function is O(n log n), where n is the length of the string, due to the sorting operation.
Space Complexity
The space complexity is O(n), where n is the length of the string, as it may contain all unique characters.

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