Scary TreeRecently Alex has been learning about the tree data structure. And, he has been struggling to write ...

Sofdor Ali's Black and White TreeSofdor Ali loves Computer Science. He prefers hexadecimal number system to decimals, just because it...

Spanning TreeThere are N nodes in a tree. You can start from any node of that tree and you have to come back to t...

How Many Ways?Regular problem solvers starts their journey by solving ad hoc and number theory. After getting the ...

Wakanda ForeverWe all know that Thanos has erased half of the population of the universe. Earth’s population was al...

Directed RectangleSami has just finished his assignments, to relax, he wants to play games. Since he’s banned from PUB...

Flow on TreeMr. Kaboom has recently learned about maximum flow. Now his friend Mr. Taboom gave him this problem....

Kingdom  Great Roads of DestinyShin wants to be the “Great General of the Heaven”. It is his dream. But becoming a “Great General o...

Bad XOR 2 (Hard)So after successfully becoming many people’s nightmare, XOR has struck again, this time to haunt you...

Act of Random Kindness (Hard)Sammy and Meera liked adventures a lot. Once in a while they used to set out adventures. This time t...

Kingdom of CodeKingdom CODE is the most peaceful place in the universe. King NOVOSH and Queen ALMIDA is ruling this...

Flyover in TwinlandRio has become the president of Twinland. Now he wants to develop his country to fulfill his promise...

Ghosh vs DattaAbout two hundred years ago, a serious dispute evoked between the two neighboring colonies of Khulna...

Darth Vader and 3PO on a Tree!Did you watch Star Wars yet? No? You should in your free time. Now back to Darth Vader and 3PO. Dart... 
Keep MovingBalurmath is a city which has N interesting tourist spots, which are connected between themselves by... 
Village Fair 2There are N houses in a village far away from here. They are numbered from 1 to N. For this problem ...

Circuit BreakerIn your free time, you like to design various electrical circuits to give a hard time to your local ...

Traveling Policy of AjobdeshIn Ajobdesh, there are multiple cities and one of them is considered as the capital city. Obviously,...

War in the Wizarding WorldThere is a deadly war going on between two countries (Bitland and Byteland) in the wizarding world. ...

A Boring GameAlice and Bob are playing a game with a tree with n nodes. Alice always plays first, and the two pla... 