#include <bits/stdc++.h>

using namespace std;

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

int st[25],n,cnt;
int viz[25],dp[50],ds[50];

void Afisare()
{
    int i;
    cnt++;
    if(cnt == 1)
    {
        for(i=1;i<=n;i++)
            fout<<st[i]<<" ";
        fout<<"\n";
    }
}

inline int Valid(int i, int j)
{
    if(viz[j]) return 0;
    if(dp[n-j+i]) return 0;
    if(ds[i+j-1]) return 0;
    return 1;
}

void Backk(int k)
{
    int j;
    if(k == n+1) Afisare();
    else
    for(j=1;j<=n;j++)
        if(Valid(k,j))
        {
            st[k] = j;
            viz[j] = 1;
            dp[n-j+k] = 1;
            ds[k+j-1] = 1;

            Backk(k+1);

            viz[j] = 0;
            dp[n-j+k] = 0;
            ds[k+j-1] = 0;
        }
}

int main()
{
    fin>>n;
    Backk(1);
    fout<<cnt<<"\n";

    fin.close();
    fout.close();
    return 0;
}