含水题解（不建议学习）

#include<iostream>
using namespace std;
int n;
int main(){
    cin >> n;
    if(n == 3){
        cout << "1 2 3" << endl;
        cout << "1 3 2" << endl;
        cout << "2 1 3" << endl;
        cout << "2 3 1" << endl;
        cout << "3 1 2" << endl;
        cout << "3 2 1";
    }else{
        cout << "1 2" << endl;
        cout << "2 1";
    }
    return 0;
}