#include <iostream>
#include <fstream>
using namespace std;
ifstream f("damesah.in");
ofstream g("damesah.out");

int n, x[101], nr_sol = 0;
bool ok;

bool valid(int k)
{
    for(int i = 1; i < k; i++)
        if(x[k] == x[i] || k - i == abs(x[k] - x[i]))
            return 0;
    return 1;
}

void afis()
{
    nr_sol++;
    if(ok == 0)
    {
        for(int i = 1; i <= n; i++)
            g << x[i] << ' ';
        g << '\n';
    }
    ok = 1;
}

void backt(int k)
{
    if(k <= n)
        for(int v = 1; v <= n; v++)
        {
            x[k] = v;
            if(valid(k))
                backt(k + 1);
        }
    else
        afis();
}

int main()
{
    f >> n;
    backt(1);
    g << nr_sol;
    f.close();
    g.close();
    return 0;
}