输出 Schema 固定（禁止自由文本漂移）
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。
。关于这个话题，91视频提供了深入分析
Unicode encodes these as separate codepoints for compatibility, but fonts use the same glyph. These are easy to handle (NFKC collapses them), but worth knowing about.
This is fundamentally different from Web streams' pipeThrough(), which starts actively pumping data from the source to the transform as soon as you set up the pipe. Pull semantics mean you control when processing happens, and stopping iteration stops processing.