#include<cstdio>
#include<string>

using namespace std;

#ifdef HOME
const string inputFile = "input.txt";
const string outputFile = "output.txt";
#else
const string problemName = "damesah";
const string inputFile = problemName + ".in";
const string outputFile = problemName + ".out";
#endif

int N, nrsol, sol;
int S[50];
int A[50];
int B[50];
int L[50];

void back(int top) {
    if(top == N + 1) {
        nrsol++;
        if(!sol)
            for(int i = 1; i <= N; i++)
                printf("%d ", S[i]);
        sol = 1;
        return;
    }

    for(int i = 1; i <= N; i++) {
        if(A[top + i] || B[top - i + N] || L[i])
            continue;

        S[top] = i;

        A[top + i] = 1;
        B[top - i + N] = 1;
        L[i] = 1;

        back(top + 1);

        A[top + i] = 0;
        B[top - i + N] = 0;
        L[i] = 0;
    }
}

int main() {
    freopen(inputFile.c_str(), "r", stdin);
    freopen(outputFile.c_str(), "w", stdout);

    scanf("%d", &N);

    back(1);

    printf("\n%d\n", nrsol);

    return 0;
}