#include<bits/stdc++.h>
#define N 100010

using namespace std;

typedef long long ll;

int a[N];

int main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);
    int n;
    cin >> n;
    for (int i=1;i<=n;i++)
    	a[i] = i;
    do
    {
    	cout << "     ";
    	for (int i=1;i<n;i++)
    		cout << a[i] << "     ";
    	cout << a[n] << endl;
	}while(next_permutation(a+1,a+n+1));
	return 0;
}

这……不应该错啊