CCF-201903-1大中小

除数的话要用double保存 题目要看清楚 每一个字都要看仔细

import java.util.Arrays;
import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int[] arr = new int[n];
		for (int i = 0; i < n; i++)
			arr[i] = sc.nextInt();
		Arrays.sort(arr);
		if (arr.length % 2 == 0) {
			String temp = "";
			if ((arr[arr.length / 2 - 1] + arr[arr.length / 2]) / 2* 2 != (arr[arr.length / 2 - 1] + arr[arr.length / 2])) {
				double d1 = (arr[arr.length / 2 - 1] + arr[arr.length / 2]) * 1.0 / 2;
				temp = String.format("%.1f", d1);
			} else
				temp = (arr[arr.length / 2 - 1] + arr[arr.length / 2]) / 2 + "";
			System.out.println(arr[arr.length - 1] + " " + temp + " " + arr[0]);
		} else {
			int d2 = arr[arr.length / 2] ;

			System.out.println(arr[arr.length - 1] + " " + d2 + " " + arr[0]);
		}
	}
}