#include <bits/stdc++.h>

using namespace std;

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

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


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

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

void Back(int top)
{
    if(top == n + 1) Print();
    else for(int j = 1; j <= n; j++)
            if(Check(top, j) )
            {
                st[top] = j;
                viz[j] = 1;
                dp[n - j + top] = 1;
                ds[j + top - 1] = 1;
                Back(top + 1);
                viz[j] = 0;
                dp[n - j + top] = 0;
                ds[j + top - 1] = 0;
            }
}
int main()
{
    fin >> n;
    Back(1);
    fout << C;
    return 0;
}