Purslane @ 2020-03-26 12:20:12
题面似乎有误导人的可能。A_{1} ,A_{3},…,A_{2k−1}让我以为是求这个序列的中位数……建议改正
by Purslane @ 2020-03-26 12:21:04
额，Markdown爆了
by chen_zhe @ 2020-03-26 12:26:19
@mazhixian fixed
by Purslane @ 2020-03-26 12:27:16
谢谢！
by Beyond616 @ 2020-11-11 19:51:40
@chen_zhe 输出格式应为A_{2i-1}