Maybe Codeforces is a total waste of time, and all of us are chasing a meaningless “Rating” that means nothing in real life. Most of us are too busy grinding useless problems to see the truth.

The Rating system is a joke—it only measures how much free time you have to spam submissions and memorize solutions, not actual skill. The Hack mechanism is just for bitter losers to ruin others’ work, and it should be removed immediately.  Go ahead, downvote me. Call me an idiot.

in my last blog a guy told me this:

The list of topics that you should learn for solving 800 rated problems : Li-Chao Segment Tree
Segment Tree Beats
RMQ in O(n)/O(1)
Any self-balancing tree except treap
Link-cut tree
Wavelet tree
Mergesort tree
Binomial heap
Fibonacci heap
Leftist heap
Dominator tree
3-connected components in O(n)
k-th shortest path
Matching in general graph Weighted matching in general graph Preflow-push
MCMF in O(poly(V,E))
Minimum arborescence (directed MST) in O(ElogV)
Suffix tree
Online convex hull in 2D
Convex hull in 3D
Halfplane intersection
Voronoi diagram / Delaunay triangulation
Operation on formal power series (exp, log, sqrt, ...) (I know the general idea of Newton method)
How to actually use generating functions to solve problems
Lagrange Inversion formula

can it be as hard as this to solve 800 rated problems?is he joking?

plz help me!!!!!

hello codeforces!

these days i am struggling to sovle the extremely hard 800 rated problems on codeforces

one of my boyfriends tells me i can learn some advanced data structure to solve the problems

can you give me some advice on learning data structure?

I got +359 in round 1001.

But now I receive a message which says that I got +361 in that round!

WTF?WHY??????