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Deven
25 lines
803 B
Python
25 lines
803 B
Python
class Solution:
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def strWithout3a3b(self, a: int, b: int) -> str:
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def build(curr: str, na: int, nb: int) -> str:
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if (na == 0 and nb == 0):
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return curr
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if (na == 0 and nb > 2):
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raise "String not possible"
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if (nb == 0 and na > 2):
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raise "String not possible"
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if (len(curr) >= 2 and curr[-1] == curr[-2]):
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if (curr[-1] == 'a'):
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return build(curr + 'b', na, nb - 1)
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else:
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return build(curr + 'a', na - 1, nb)
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else:
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if (na > nb):
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return build(curr + 'a', na - 1, nb)
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else:
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return build(curr + 'b', na, nb - 1)
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return build("", a, b) |