输出：[4,2,4,-1,4]（最后一个 3 绕一圈找到 4）
货运方面，春节假期国家铁路日均装车 15.7 万车，同比增长 1.8%。铁路部门充分利用大秦、瓦日、浩吉、兰新等主要货运通道能力，重点保障粮食、春耕物资及节日用品运输，全国铁路直供电厂存煤水平保持较高。
。关于这个话题，服务器推荐提供了深入分析
Dury arrived at the location following a gruelling four-hour journey, which should have been two hours, but was made longer by road closures.，这一点在Line官方版本下载中也有详细论述
"The international community is working hard trying to set standards and new regulations, but space commerce is changing faster than we can keep up," he added.