/*
    Name:
    Copyright:
    Author:
    Date: 27/04/14 07:09
    Description: Chinh Hop Khong Lap
*/
#include <iostream>

using namespace std;

void printResult(int a[], int &k) {
    for (int i = 0; i < k; ++i)
        cout << a[i] << " ";
    cout << endl;
}

void chinhHopKhongLap(int a[], int d[], int &n, int &k, int i) {//d kiem soat rang buoc
    for (int j = 0; j < n;  ++j) {
        if (d[j] == 0) {
            a[i] = j + 1;
            d[j] = 1;
            if (i == k-1)//Diem chot archor
                printResult(a, k);
            else
                chinhHopKhongLap(a, d, n, k, i + 1);
            d[j] = 0;//Tra ve cho lan thu(hoan vi)tiep theo
        }
    }
}

int main() {
    int n, k;
    cout << "Enter n: ";
    cin >> n;
    cout << "Enter k(k<=n): ";
    cin >> k;
    if (k > n)
        return 0;
    int *a = new int[k];
    int *d = new int[n]{0};
    chinhHopKhongLap(a, d, n, k, 0);
    delete []a;
    delete []d;
    a = d = NULL;
    return 0;
}