algorithm-in-python/math/numWeight/nega.py
2019-06-02 23:16:01 +08:00

13 lines
351 B
Python

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