Hi dear CF community!

We have a 'Looking for a challenge' book, and we (my friend Kerim.K) decided to scan and upload it.

Here is the link. Quality is so good.

Have you seen this before ? :D

Hi there!
Is there going to be online-mirrors of Day 1 and Day 2?
Someone have info about this?

UPD: First online-version of IOI 2016 Day 1 will start on August 14, at 10:00 on https://contest.yandex.com/ioi/
UPD: Second online-version of IOI 2016 Day 2 will start on August 16, at 10:00 on https://contest.yandex.com/ioi/

Happy all programmer's day :)

Where I can learn some techniques of number theory which I can use in competetive programming?

After I started to use <bits/stdc++.h> and C++11 my compiler is slowing down. Compilation finishes around 3secs. Is there any way to speed up? I use Ubuntu and Geany. [Sorry for bad English...]

It would be fabulous if Codeforces had Algorithm tutorials by CF members like Topcoder. Between CONTESTS tab and GYM tab :)

Why this solution got AC ?! I couldn't understand. Can someone hack this solution ?!

Firstly, I want to say that it is my first blog.Sorry for my grammar mistakes. Is there any information about JBOI 2014 ? Does anyone know something about it ?( Place,date,offical site,etc.) I would be happy if someone say sth about it.