PYTHON

recaman=dict(enumerate([1],start=1))
n=int(input())
for k in range(2,n+1):
    if recaman[k-1]-k>0 and recaman[k-1]-k not in recaman.values():
        recaman[k]=recaman[k-1]-k
    else:
        recaman[k]=recaman[k-1]+k
print(*sorted(recaman.values()))