###要爆long long
by OccDreamer @ 2017-09-06 15:48:09
当n很大时i大概有十的二三十次方吧,枚举i显然超时啊,这题也不可能这么水。。。
by W584102684 @ 2017-10-10 16:46:31
顺便举个例子:
输入:9999
输出:11112222333344445555666677778889
36个1(懒得手打)
by ttklwxx @ 2018-05-13 08:16:18