Zeronfinity

Ash Ketchum has a weird rooted tree (read Notes sections if you don't know about tree data structure...

Adhoc, NumberTheory Moderate 1/6/12

During admission exams in the city of RR (Royal Royal city), the students of RR University of Engine...

Interactive, NumberTheory Hard 19/21/73

On the planet of Royal Royal, a university named Royal University of Engineering and Technology exis...

ChineseRemainderTheorem, SegmentTree

One day, Nafu was whining a lot to his roommate Pika to buy Nafu some food. Nafu is famously known a...

Very Easy 11/35/204

Being encouraged by XOR operation of binary numbers, Nanna Munna has decided to make a new kind of d...

Moderate 1/4/9

Hasinur wants to give treat. Why? Because, he's been going out with someone new. But Hasinur doesn't...

Easy 11/63/236

I am trying to become a good guy, because it doesn't take money to become good. So here's a short an...

NumberTheory Moderate 6/32/193

I am trying to become a good guy, giving contestants as little pain as possible. So, this problem is...

DivideAndConquer, NumberTheory Moderate 7/20/101

Liakot, the king of Cox's Bazar, is currently in a dire situation. His own younger sister Ayesha is ...

DataStructure Hard 6/6/47

"You are being watched. The government has a secret system: a machine that spies on you every hour o...

Moderate 159/226/611

Tommy is an unlucky guy who used to work on the docks. He and his wife Gina are not financially stab...

String Moderate 15/23/119

Prime number seems to be trending topic for programming contest. As such, Piyash, being an aspiring ...

Moderate 29/55/192

Poga is a war victim who lost everyone dear to her in war. Now, she leads a team of veterans who try...

Moderate 4/7/125

To end the long-running feud between Superman and Goku fans regarding who's stronger, Zeron has deci...

DP, PersistentLiChaoTree, SegmentTree Moderate 3/4/17

The archipelago of Mirpur consists of N islands. The famous architect PogPog was hired to connect al...

DisjointSets, MST, TwoPointer Moderate 32/43/185

One of the biggest arguments between comic and anime fans is the topic of Superman vs Goku. Another ...

MatrixExponentiation Moderate 2/2/7

To become economically stable, Saturn has come up with a new kind of business, tree business. At fir...

NumberTheory 17/59/187

Do you know Doctor Strange from Marvel? He thought he was the master of time. But one day he came to...

Moderate 3/14/77

Zer is a programmer who has a friend named Nir. Nir always shows off how great EEE is. One day Nir c...

Flow 10/14/41

Zoba has 3 strings, named S1, S2 and S3. He wanted to make a tough problem for Mihaf with these stri...

DFS, Eertree Moderate 12/20/150