arr[j + gap] = arr[j];
В России ответили на имитирующие высадку на Украине учения НАТО18:04
，详情可参考51吃瓜
从产业趋势看：租赁只是过渡，不是终局站在更宏观的角度看，机器人租赁的出现，是技术成本下降与市场认知上升之间的过渡形态。
By pushing side effects to the edges and keeping our core logic pure, we gain a deterministic and secure execution trace. As a result, debugging shifts from guessing what might have happened to watching exactly what did happen, all without compromising user privacy.