A Perfect Binary Tree A perfect binary tree is a binary tree in which all interior nodes have two children and all leaves ... |

Dynamic Tree You are given a tree containing N vertices. The vertices are numbered from 1 to N. A tree with N ver... |

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

Cheap Tourist The country of Byteland is divided into N provinces numbered from 1 to N. The provinces are connecte... |

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