Submission #432481

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Source Code Expand

import java.io.BufferedReader;
import java.io.Closeable;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.StringTokenizer;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Scanner;


public class Main {
	public static void main (String[] args) {
		try(Scanner sc = new Scanner(System.in)){
		        
		        final String S = sc.next();
		        final int N = sc.nextInt(); 
		        
		        ArrayList<String> list = new ArrayList<String>();
		        
		        for(final char s1 : S.toCharArray()){
		        	for(final char s2 : S.toCharArray()){
		        		list.add("" + s1 + s2);
		        	}	
		        }
		        
		        Collections.sort(list);
		        
		        System.out.println(list.get(N - 1));
		        
		}catch (Exception e) {e.printStackTrace();}
	}
	
	public static class Scanner implements Closeable{
	    private BufferedReader br;
	    private StringTokenizer tok;

	    public Scanner(InputStream is) throws IOException {
	        br = new BufferedReader(new InputStreamReader(is));
	    }

	    private void getLine() throws IOException {
	        while (!hasNext()) { tok = new StringTokenizer(br.readLine()); }
	    }

	    private boolean hasNext() {
	        return tok != null && tok.hasMoreTokens();
	    }

	    public String next() throws IOException {
	        getLine(); return tok.nextToken();
	    }

	    public int nextInt() throws IOException {
	        return Integer.parseInt(next());
	    }
	    
	    public void close() throws IOException {
	        br.close();
	    }
	}
}

Submission Info

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