发重了，还有一个是样例https://i.loli.net/2019/03/31/5ca009d88438f.png
by jun1lesszZZ @ 2019-03-31 08:29:48
[这个](https://i.loli.net/2019/03/31/5ca009d88438f.png)
by jun1lesszZZ @ 2019-03-31 08:30:31
@[zZZ_han](/space/show?uid=128119) 你的ans！=0
by dead_gun @ 2019-03-31 10:09:04
@[lv_mao_da_lao](/user/133520) 头次听说这是贪心
by djwj233 @ 2020-02-10 13:13:26