731 B | 731 chars
import sys
from math import sqrt, pi, sin, factorial, ceil, floor
from datetime import datetime, timedelta
# sys.setrecursionlimit(10**7)
BLANK = " "
# inp = input
inp = lambda : sys.stdin.readline().rstrip()
mii = lambda x = BLANK : [*map(int,inp().split(x))]
mfi = lambda x = BLANK : [*map(float,inp().split(x))]
ii = lambda : int(inp())
fi = lambda : float(inp())
p = print
def gcd(a, b): return gcd(b, a % b) if b > 0 else a
def lcm(a, b): return a * b // gcd(a, b)
def solve():
n = ii()
left = []
right = []
for i in range(1, n + 1):
if i % 2 == 1:
left.append(i)
else:
right.append(i)
right = right[::-1]
p(*(left + right))
if __name__ == "__main__":
tc = 1
for t in range(1, tc+1):
ret = solve()