#include <iostream>
#include <vector>

using namespace std;
vector<vector<int>> dp;


void print(vector<int> v) {
    for(int i : v)
        cout << i << " ";
}

vector<int> paint_back(int x) {
    vector<int> result;

    for (int i = dp[x].size() - 1; i >= 0; i--)
        result.push_back(-dp[x][i]);

    return result;
}

void paint_next(int x) {
    int prev = x - 1;
    int next = x + 1;

    for (auto i : dp[x])
        dp[next].push_back(i);

    for(auto i : paint_back(prev))
        dp[next].push_back(i);

    dp[next].push_back(next);

    for(auto i : dp[prev])
        dp[next].push_back(i);
}


int main() {
    int n;
    cin >> n;

    if (n == 1) {
        cout << 1 << endl;
        return 0;
    }

    dp = vector<vector<int>>(n + 1);
    dp[1] = {1};
    dp[2] = {1, 2};


    for (int i = 2; i < n; i++)
        paint_next(i);

    print(dp[n]);
    cout << endl;
    return 0;
}