interface image-lib {
{ 24, 10, 12, 26, 35, 47, 49, 37 },
，推荐阅读搜狗输入法下载获取更多信息
* 核心思路：链表转数组 + 单调栈（从后往前遍历），时间复杂度O(n)，空间复杂度O(n)
Equal (5): Everything in this purple space must be equal to 5. The answer is 5-5, placed horizontally; 5-6, placed vertically.