@[czy0323](/user/538427) l>r continue???
by hjy192939 @ 2022-09-15 00:20:10
`if(l>r) swap(l,r);`
by cyffff @ 2022-09-15 06:49:30
@[hjy192939](/user/576157) 原来题目是这个意思吗qwq
by czy0323 @ 2022-09-15 07:30:57
@[cyffff](/user/365127) 谢谢dalao，已经AC了
by czy0323 @ 2022-09-15 07:45:21