Collectors Problem The Bat club controls Gotham City. They decided to bring equality to the city (Of course, with some ... |

Count Bridges You are given an unweighted, undirected, and connected graph consisting of N nodes and M edges. You ...
Moderate
2/4/15 |

COVID-19 Outbreak COVID-19 outbreak in Atlantis is so bad that the government is forced to lock down the whole country... |

Equalizing Pillars There are $N$ pillars made of bricks. The height of each pillar is the number of bricks in that pill...
Moderate
19/40/182 |

Good and Evil Inside each of us, there is the seed of both good and evil. It's a constant struggle as to which on...
Moderate
11/17/55 |

Hidden Graph There is an unweighted, undirected hidden graph. You are given an integer range from L to R. There a... |

How Many Shortest Paths? You are given a $Directed$ $Acyclic$ $Graph$ consists of $N$ nodes and $M$ edges. A little bug is cu...
Easy
21/33/175 |

Land of Riches Mankind has recently discovered the secret wealth in Mars. Many powerful countries are trying to get...
Moderate
10/14/50 |

Make Strings Great Again! Do you know what is a sub-sequence? A sub-sequence is a sequence that can be derived from another se... |

Matrix Resurrection We have a two-dimensional matrix consisting of N rows and M columns. The rows are numbered from 1 to...
Moderate
9/18/71 |

Multiverse Of Courier Service Dr. Strange finally discovered a safe way to travel between parallel universes. By noticing people’s... |

Path Intersection Extended Do you remember the problem from ICPC Dhaka Regional 2018 named $Path$ $Intersection$ by Md. Imran B... |

Pile of Crabs There is a pile of crabs standing on one top of another. There are total N crabs numbered 1 to N. T...
Moderate
38/49/78 |

Preparing for War There were N cities in England. Each contained a warrior with skillset equal to X. All the cities we... |

Seven Kingdoms! The dragon queen just conquered the Seven Kingdoms. Initially there are N cities in "Seven Kingdoms"... |

Shortest Path? Given an unweighted, undirected and connected graph consists of $N$ nodes numbered from $1$ to $N$. ... |

Shortest Sub-Array You are given an array $A$ consists of $N$ elements. You have to perform $Q$ queries on the array. ...
Moderate
38/51/222 |

Water in a Tree There is a tree consist of N nodes and N−1 edges. The ith node contains Si liters of water with a t...
Moderate
6/8/23 |

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