Problems (1) 给一棵带边权的树,求遍历这棵树(每个节点至少经过一次)再回到起点的最短路程. 答案是显然的:边权之和的两倍. (2)给一棵带边权的树,求遍历这棵树(每个节点至少经过一次)的最短路程. (3)给一棵带边权的树T(V,  E ),求T的含K个节点的连通子图的边权和的最小值.…

E. Little Girl and Problem on Trees time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output A little girl loves problems on trees very much. Here's one of them. A tree is an undirected connected g…

http://kukuruku.co/hub/python/introduction-to-machine-learning-with-python-andscikit-learn Hello, %username%! My name is Alex. I deal with machine learning and web graphs analysis (mostly in theory). I also work on the development of Big Data product…

A - Cookie Exchanges 题面 Takahashi, Aoki and Snuke love cookies. They have A, B and C cookies, respectively. Now, they will exchange those cookies by repeating the action below: Each person simultaneously divides his cookies in half and gives one half…

In this post we take a tour of the most popular machine learning algorithms. It is useful to tour the main algorithms in the field to get a feeling of what methods are available. There are so many algorithms available and it can feel overwhelming whe…

C. Useful Decomposition time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Ramesses knows a lot about problems involving trees (undirected connected graphs without cycles)! He created a new us…

A - Cookie Exchanges 模拟 Problem Statement Takahashi, Aoki and Snuke love cookies. They have A, B and C cookies, respectively. Now, they will exchange those cookies by repeating the action below: Each person simultaneously divides his cookies in half…

https://machinelearningmastery.com/a-tour-of-machine-learning-algorithms/ http://blog.csdn.net/u011001084/article/details/52523897 A Tour of Machine Learning Algorithms by Jason Brownlee on November 25, 2013 in Machine Learning Algorithms   In this p…

C. Useful Decomposition time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Ramesses knows a lot about problems involving trees (undirected connected graphs without cycles)! He created a new us…

Useful Decomposition time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Ramesses knows a lot about problems involving trees (undirected connected graphs without cycles)! He created a new usefu…