#include<iostream>
using namespace std;
#include<vector>
int main() {
	int n;
	cin >> n;
	vector<int> s(n);
	int left = 0;
	int right = n - 1;
	int t = n * 2 - 2;
	while (left <= right) {
		s[left] = s[right] = t;
		t -= 2;
		left++;
		right--;
	}
	for (int i = 0; i < n; i++)cout << s[i] << endl;
	return 0;
}