[java 백준] 실버 5/ 11004번 K번째 수

https://www.acmicpc.net/problem/11004

11004번: K번째 수

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Arrays;
import java.util.StringTokenizer;
 
public class Main {
 
    public static int n;
    public static int k;
    public static long[] arr;
 
    public static void main(String[] args) throws NumberFormatException, IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        StringTokenizer st;
        st = new StringTokenizer(br.readLine());
        n = Integer.parseInt(st.nextToken());
        k = Integer.parseInt(st.nextToken());
        arr = new long[n];
 
        st = new StringTokenizer(br.readLine());
        for (int i = 0; i < n; i++) {
 
            arr[i] = Long.parseLong(st.nextToken());
        }
 
        Arrays.sort(arr);
        System.out.println(arr[k - 1]);
 
    }
 
}

Arrays.sort만 쓰면 끝난다. 매우 쉬운 문제다.