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- n=int(input("N="))
- a=1
- c=1
- d=1
- while c<=n-1:
- if ((d%2)==0 & d!=n):
- print(d,end="+")
- else:
- print(d,end="-")
- d=(a+1)
- c=c+1
- a=a+1
- print(d)
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