题解 | #打印极值点下标#注意两端也要判断是否是极值点

import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        while (sc.hasNextInt()) {
            int k = sc.nextInt();
            int[] nums = new int[k];
            for (int i = 0; i < k; i++) {
                nums[i] = sc.nextInt();
            }
            for (int i = 0; i < k; i++) {
                if (i == 0) {
                    if (nums[0] != nums[1]) {
                        System.out.print(0 + " ");
                    }
                } else if (i == k - 1) {
                    if (nums[k - 1] != nums[k - 2]) {
                        System.out.print(k - 1 + " ");
                    }
                } else if (nums[i] > nums[i - 1] && nums[i] > nums[i + 1] || nums[i] < nums[i - 1] && nums[i] < nums[i + 1]) {
                    System.out.print(i + " ");
                }
            }
            System.out.println();
        }
    }
}