Now he wants to know the number of unordered pairs of indices(u, v)(u ≤ v), such that the sum of indices of all nodes along the simple path betweenuandv(including endpoints) is equal tos. Can you help him and count this value? The only line of the input contains a single...
Given a weighted tree , solve q queries , each query is of form "u v" , return maximum edge weight lying on path from node u to node v. 1<=n<1e5 , 1<=q<=1e5
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ui(1 ≤ ui ≤ n) and a stringsi, whereuiis the number of vertex, andsirepresents the path starting from this vertex. Stringsidoesn't contain any characters other than 'L', 'R' and 'U', which mean traverse to the left child, to the right child and to the parent, respec...
ERROR [org.apache.hadoop.util.Shell] - Failed to locate the winutils binary in the hadoop binary path 2018-04-11 17:14 − ... 子墨言良 0 4519 相关推荐 [CF438E]The Child and Binary Tree 2019-12-24 14:44 − [传送门](https://codeforces.com/problemset/problem/438/E) # 题目...
Codeforces Round #411 (Div. 2) D. Minimum number of steps(思维题目) 题目链接:http://codeforces.com/contest/805/problem/D 【中文题意】给你一个只包含a和b两种字符的字符串,让你对它进行变换,使得变换后的字符串不含有ab这种子串。变化规则如下:ab->bba。问你至少经过多少次变换能使字符串满足条件...
Alright, so this is my 2ndpost here. The 1stone, as you can see, was written in Vietnamese – my mother tounge, just because I thought that CodeForces Blog could be used for my personal purposes and my entry would not be read by anyone else, except me :D ...
A tree is a connected graph without cycles. A rooted tree has a special vertex called the root. A parent of a vertex v is the last different from v vertex on the path from the root to the vertex v. The depth of the vertex v is the length of the path from the root to the verte...
}inthalfpath(intbl,intbr,intal,intar){//拿出前序遍历的元素到中序遍历中查询位置if(al==ar)return0;introot =find(b[bl],al,ar);//找出前序遍历中第bl个元素在中序遍历序列中的位置intlen=root-al;//中序遍历中第bl个元素的位序差halfpath(bl+1,bl+1+len,al,root);//左子树halfpath(bl+1...
bitsetalgorithmsbitsgreedydynamic-programminggreedy-algorithmsbinary-searchstring-matchingstring-searchspoj-solutionsad-hoccodeforces-solutionsalgorithms-and-data-structuresfenwick-treeatcoder-solutionsbinary-indexed-treelcs-algorithmatcoder-educational-dp Updatedon Apr 28, 2020 ...