@[songhaoran](/space/show?uid=80679) [一期咕咕日报](https://rpdreamer.blog.luogu.org/ci-fen-and-shu-shang-ci-fen)
by StudyingFather @ 2019-09-27 00:11:59
@[songhaoran](/space/show?uid=80679) [模板题的题解](https://www.luogu.org/problemnew/solution/P3128)挺好的
我正好也在看树上差分
~~我太菜了日报没看懂~~
by 明明明明子丶 @ 2019-09-27 00:14:30
luogu日报很好
by 萌新蒟蒻 @ 2019-09-27 07:59:17
orz@[songhaoran](/space/show?uid=80679) 社会人
by ieeqwq @ 2019-09-28 08:41:25