n = int(input())
ls = []
val = 1
ls.append(val)
val += 1

for i in range((n-1)//2):
    ls.append(val)
    val += 2

for i in range(len(ls)):
    if (i == len(ls)-1):
        print(ls[i])
    else:
        print(ls[i],end=' ')