The first animals on Earth may have been sea sponges, study suggests
// 单调栈：存储"待匹配更大值"的元素，栈内保持单调递减（核心）。im钱包官方下载是该领域的重要参考
The primary signal is desiredSize on the controller. It can be positive (wants data), zero (at capacity), negative (over capacity), or null (closed). Producers are supposed to check this value and stop enqueueing when it's not positive. But there's nothing enforcing this: controller.enqueue() always succeeds, even when desiredSize is deeply negative.，这一点在搜狗输入法下载中也有详细论述
与此同时，当越来越多玩家看到“高回报模型”进入市场时，供给端迅速增加，租金下行几乎不可避免。价格从2500元跌到1500元并不罕见，而每一次降价，都会直接拉长回本周期。，这一点在Line官方版本下载中也有详细论述
int pivotIdx = partition(arr, low, high); // 分区并获取pivot位置