algorithmStudy/15652.cpp at master · judy5050/algorithmStudy · GitHub

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//
//  15652.cpp
//  algo
//
//  Created by 박효정 on 2021/09/22.
//

#include <iostream>
#include <algorithm>
#include <vector>

using namespace std;

int n,m;

void dfs(int num,string s){

        if(num>n||s.size()>=m){
            if(s.size()==m){
                for(int j=0;j<s.size();j++){
                    cout<<s[j]<<' ';
                }
                cout<<"\n";
            }

            return;
        }

        dfs(num,s+to_string(num));
        dfs(num+1,s);


}

int main(){

    cin.tie(0);
    cout.tie(0);
    std::ios::sync_with_stdio(false);

    cin>>n>>m;


    dfs(1,"");


    return 0;
}