15 lines
247 B
Python
15 lines
247 B
Python
def removeDuplicates(st: str):
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st = list(st)
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letters = set()
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i = 0
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while i < len(st):
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if st[i] in letters:
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st.pop(i)
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else:
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letters.add(st[i])
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i += 1
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return "".join(st)
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