@[kkksc03](/space/show?uid=1)
by hcute @ 2017-11-01 19:12:20
没毛病啊树状数组是单点修改区间求值，线段树是区间修改区间求值，而且为啥要@管理员...
by Paperback_Writer @ 2017-11-01 19:18:10
啊，我懂你意思了...
by Paperback_Writer @ 2017-11-01 19:18:48