#include <fstream>

using namespace std;

ifstream fin("damesah.in");
ofstream fout("damesah.out");

const int DIM = 30;

int n;
int sol[DIM], solCnt;
bool vis[DIM], diag1[DIM], diag2[DIM];
bool found = false;

void backtrack(int step) {
    if (step == n + 1) {
        if (!found) {
            found = true;
            for (int i = 1; i <= n; i++)
                fout << sol[i] << ' ';
            fout << '\n';
        }
        solCnt++;
    } else {
        for (int i = 1; i <= n; i++) {
            if (!vis[i] && !diag1[n + step - i] && !diag2[step + i - 1]) {
                sol[step] = i;
                vis[i] = true, diag1[n + step - i] = true, diag2[step + i - 1] = true;
                backtrack(step + 1);
                vis[i] = false, diag1[n + step - i] = false, diag2[step + i - 1] = false;
            }
        }
    }
}

int main() {
    fin >> n;

    backtrack(1);
    fout << solCnt;

    return 0;
}