2017年8月20日
Round #429 (Div.2)
摘要： 恢复内容开始 One day Kefa found n baloons. For convenience, we denote color of i-th baloon as si — lowercase letter of the Latin alphabet. Also Kefa has k f 阅读全文
posted @ 2017-08-20 19:15 浅忆~ 阅读(147) 评论(0) 推荐(0)