蓝桥杯官网OJ 快速排序 ----java快读

 java何时使用快读：当数据量达到10^5以上并且数据是一行一行读入的

import java.io.*;
import java.util.Arrays;
public class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        int n = Integer.parseInt(reader.readLine());
        int[] arr = new int[n];
        for (int i = 0; i < n; i++)arr[i] = Integer.parseInt(reader.readLine().trim());
        reader.close();
        Arrays.sort(arr);
        for (int i = 0; i < arr.length; i++)System.out.println(arr[i]);
    }
}