friends = [Humanthe2nd, PythonshellDebugwindow, yujhtheyujh, htoshiro, weewoo14, volcano, ostrichthattypes, justinw_1]

orz bruce, kuruluu, CubixularHelix, polarity

Sqrt decomp > segment tree

https://clist.by/coder/Ivan_Li/

Some good sqrt decomposition problems:

• https://dmoj.ca/problem/dmopc15c1p6
• https://dmoj.ca/problem/segtree
• https://dmoj.ca/problem/stp3 (tip: use block size 400)
• https://dmoj.ca/problem/tsoc15c2p6 (tip: use block size 600)
• [insert segment tree problems (lazy included)]
• [insert fenwick tree problems]
• [remove persistent segment tree problems]

Personal achievements:

• solving https://dmoj.ca/problem/cco13p3 after 2 month
• using sqrt on seg tree problem (too many to list)
• solving https://dmoj.ca/problem/year2016p8
• creating a contest

Goals:

• solve https://dmoj.ca/problem/ccc19s4 without help