Circle Mystery Here, $A$ is the center of the circle and $BCD$ is a tangent which intersects with the circle at th...
Moderate
96/105/118 |

Game of Guessing Her Password! This is an interactive problem. Like everyone, Nubu the random coder girl, has a secret password. On...
Moderate
34/60/352 |

Holy Tree What is a tree? A tree is a bidirectional connected graph with no cycle. In a tree, we can create ... |

Meena, Raju and Mango Tree Clever girl Meena likes to climb trees. One day her brother Raju, after coming back from school, sai...
Very Easy
9/14/60 |

Meena Raju and Two Trees Meena's father gifted Meena and Raju two trees. Since they may quarrel, these two trees are exactly ...
Moderate
3/7/42 |

Mr Makor And His Friends Mr Makor has a set S of n integers. He calls a sequence of length k special if every element of the ... |

Reduce Articulation Point Given a tree. Tree is an undirected connected acyclic graph. Wiki You should add exactly one edge t...
Easy
3/30/75 |

Restore Magic Rectangle Random coder boy Kiny once had a rectangle (2D grid) as quarantine gift. Every random people have so...
Moderate
5/16/38 |

Subarray Pyramid An integer sequence $b_1, b_2, \ldots, b_m$ is a pyramid if it satisfies the following conditions: ...
Moderate
46/63/219 |

Trina Loves Mangoes Trina loves mangoes. And she is a valuable member of the famous Mango Eaters Community. This communi...
Very Easy
8/13/57 |

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