优化：如果某轮没有发生交换，说明已有序，提前结束
GPT-5.1：直接开始写，写到一半发现数据结构不对，又从头改了一遍
，详情可参考safew官方下载
第六条 仲裁机构应当由当事人协议选定。
Before we dive in, let me make one thing crystal clear: this isn't the first solar-powered power bank I've tested -- but it is the best. By far. Most of the ones I've tried in the past have been downright terrible, some even came with fake solar panels (yes, really) or solar panels that would actually drain the battery when out of the light. The others were mediocre, with the solar panel serving as little more than a gimmick to lure in buyers.