[C++] 15651 - N과 M (3)

문제 링크 : https://www.acmicpc.net/problem/15651

15651번: N과 M (3)

 

 

 

#include<iostream>
#include<algorithm>
#define endl '\n'
 
using namespace std;
 
int arr[10];
int n, m;
int isuse[10];
 
void NM(int k);
 
int main(void)
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    cin >> n >> m;
    
    NM(0);
 
    return 0;
}
 
void NM(int k)
{
    if(k == m)
    {
        for(int i = 0; i < k; ++i)
            cout << arr[i] << ' ';
        cout << endl;
        return;
    }    
 
    for(int i = 1; i <= n; ++i)
    {
        arr[k] = i;
        isuse[i] = 1;
        NM(k+1);
        isuse[i] = 0;
    }
}