#include <iostream>
using namespace std;

const int N = 100010;

bool a[N];
int n;

int main()
{
    cin >> n;
    int res = n;
    bool change = true;
    int i = 1;
    while (res > 0)
    {
        while (a[i]) 
        {
            i ++;
            i = i % (n + 1);
            if (i == 0) i = 1;
        }
        if (change)
        {
            cout << i <<" ";
            a[i] = true;
            res --;
        }
        i ++;
        i = i % (n + 1);
        if (i == 0) i = 1;
        change = !change;
    }
    return 0;
}