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...

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...

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

C++ Vector SimulationArray is an important data structure in computer science. It is also very important when it comes fo...

404 Setter Not Found! 😲Given a 2D 4connected grid. Each cell contains a value and an identifier. Values can be propagated ...

Unbelievable ArrayYou will be given an array A of n integers and q operations. There are two types of operations: 1 x...

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

Plant Trees, Save LifeThere are n students in a school. Some of them are friends with each other. You want to make the sch...

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

Poltu and GraphPoltu has got a graph with N nodes and M edges. Every edge has a weight. There can be multiple edges...

Freezing TreesWe heard you like trees. But this problem has no relation to trees being frozen. :D You are given a ...

Team FormingBen is the instructor of a camp. He is forming several teams consisting of the students of the camp....

Metro Rail BlocksThe city of Dhaka is experiencing the construction of metro rails. Imagine one such metro rail spans...

Yet Another XOR ProblemGiven a rooted tree with N nodes where each node has a value, find a pair of nodes (u, v) so that u ...

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Help to Be HappyA country named Mueawin has one or more villages and one or more people live in every village. Two p...

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