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13 lines
351 B
Python
13 lines
351 B
Python
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def nega(n:int,base=-2:int)->:list:
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'''return list of num, the first is the highest digit'''
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if base>-2:
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raise Exception(f"[Error]: invalid base: {base}, base should be no more than -2")
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ans = []
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while n:
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k = n%base
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if k<0:
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k-=base
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ans.append(k)
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n = (n-k)//base
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return ans[::-1]
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