Цены на нефть взлетели до максимума за полгода17:55
pixels exec mybox -- sudo journalctl -fu pixels-devtools
，详情可参考下载安装 谷歌浏览器 开启极速安全的 上网之旅。
* 核心思路：单调递减栈（找「上一个比当前价格大的元素索引」），时间复杂度O(n)，空间复杂度O(n)
A new transaction is added to the system. It is then relayed to a network of computers located around the world. The computers then solve equations to ensure the authenticity of the transaction.