A. Angles!!!ABCD is a convex quadrilateral. E, F, G, H are the midpoints of AB, BC, CD and DA respectively. EP a...

B. Call a MeetingAlice and Bob are hosting a programming contest in Abiland. All the judges live in different cities ...

C. Good and Bad BoysAs you all know that it is high time for good and bad boys to do good and bad things in the upcoming...

D. Playing with DivisorsYour best friend is attending math class at the university. Teacher gave him two problems during the...

E. Power of ArmyRecently Chikanu declared war against Shukanu. To win the battle against Shukanu he wants to form an...

F. Simple FunctionMr. X is course teacher of Numerical Analysis. Gentleman X has announced that if anyone can solve th...

G. Walk LessYou live in a city which consists of N points. The points are numbered from 1 to n. The distance bet...

H. XORsYou are given nnn integers as a1a_1a1, a2a_2a2, a3a_3a3, a4a_4a4, …, ana_nan. First of all, you...

I. SubodhSubodh is going to paint a very big wall. The wall is composed of NNN adjacent parts in line. He wan...

Practice contests allow you to rerun contests and experience them as close as possible to the original run.
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