AI Translated from Chinese Problem Problem Statement Given a tree, for each node, consider the maximum value d such that after removing d edges, the node can still reach at least one other node. Compute the sum of these d values across all nodes. Input The first line contains an integer n (1 ≤ n ≤ 2×10^5), the number of nodes in the tree. The next n-1 lines contain edges of the tree. ...
First CF solution write-up
States and state transition equations
For example… the one-stroke problem?
Hash and BFS
Reducing unnecessary enumeration
Everything looks like a binary tree lately (
Simple yet not so simple
Collision of Python and mathematics
AI Translated from Chinese Introduction In India, there is an ancient legend. In the temple of Benares, at the center of the world, a brass plate holds three diamond needles. When the Hindu god Brahma was creating the world, he threaded 64 gold discs from large to small onto one of the needles from bottom to top. This is the so-called Tower of Hanoi. Day and night, a monk constantly moves these gold discs to another needle according to the following rules: Only one disc can be moved at a time, and a smaller disc must always be on top of a larger one. When all the gold discs have been moved from the needle where Brahma threaded them to the third needle, the world will be destroyed in a thunderclap, and the tower, temple, and all living beings will perish together… ...