A. Colorful Stones (Simplified Edition) 模拟. B. Roadside Trees (Simplified Edition) 每次转移时,只需要爬到\(min(h_i,h_{i+1})\)位置,然后跳到下一个位置即可. C. Escape from Stones 当\(s_i=l\)时,先输出左边的数,否则先输出\(i\),在处理右边的数. D. Good Sequences \(a_i<a_{i+1}\),那么对于每个\(a_i\)找到所有质因子中最长的…
A. Colorful Stones (Simplified Edition) time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output There is a sequence of colorful stones. The color of each stone is one of red, green, or blue. You a…
For a undirected graph with tree characteristics, we can choose any node as the root. The result graph is then a rooted tree. Among all possible rooted trees, those with minimum height are called minimum height trees (MHTs). Given such a graph, write…
Given n, how many structurally unique BST's (binary search trees) that store values 1...n? For example,Given n = 3, there are a total of 5 unique BST's. 1 3 3 2 1 \ / / / \ \ 3 2 1 1 3 2 / / \ \ 2 1 2 3 这道题实际上是Catalan Number卡塔兰数的一个例子,如果对卡塔兰数不熟悉的童鞋可能真…
Given n, generate all structurally unique BST's (binary search trees) that store values 1...n. For example,Given n = 3, your program should return all 5 unique BST's shown below. 1 3 3 2 1 \ / / / \ \ 3 2 1 1 3 2 / / \ \ 2 1 2 3 confused what "{1,#,2…