描述：n 辆车在单行道开往 target。车不能超车，可追上前车并同速行驶。车队定义为并排或同速行驶的车组。返回到达目的地的车队数量。
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// it is ok to write more data，推荐阅读im钱包官方下载获取更多信息
A winding road to enter V86
Allows you to edit a document without affecting the formatting.