quickSortRecursive(arr, 0, n - 1);
对待过去，新官要理旧账；面向未来，甘于“栽树”“铺路”；着眼全局，树牢“一盘棋”意识……每个人都要跑好属于自己的“这一棒”，“当好中国式现代化建设的坚定行动派、实干家”。
。服务器推荐是该领域的重要参考
四步口诀：倒着来 → 弹 ≤ 当前的 → 栈顶即答案 → 当前入栈。
For horizontal movement we can do even better. If your snake is moving to the right, we start by deleting every character on the left edge of the screen and inserting a new one on the right edge. After that, we do our patching (if needed). This automatically moves fruit into the correct position without us even needing to reprint it!