用两个树状数组bit[1]表示奇点的操作,bit[2]表示偶点的操作,这样,再执行1操作的时候,根据ct[x]的值,在指定的bit种对区间[Lx,Rx]+c,在另一个bit上对[Lx,Rx]-c。查询的时候,输出初始值+Bit[ct[x]].query(x)就ok。 #include <iostream> #include <cstdio> #include <algorithm> #incl
The graph shown above is taken as input in both the programs mentioned below. Depth First Search Program in C [Adjacency Matrix] #include<stdio.h> void DFS(int); int G[10][10],visited[10],n; //n is no of vertices and graph is sorted in array G[10][10] void main() { int i...
}e[M <<1];inthead[N], tot;voidadd(intu,intv){ e[++tot].to = v; e[tot].next = head[u]; head[u] = tot; }inta[N];structSegTree{structNode{intl, r;intval, lazy;#definel(p) tree[p].l#definer(p) tree[p].r#definelson (p << 1)#definerson (p << 1 | 1)#define...
They form a spanning tree of GG, rooted at the vertex 1. We'll call these edges span-edges; all other edges are called back-edges. This is the DFS tree of our graph: Observation 1. The back-edges of the graph all connect a vertex with its descendant in the spanning tree. This is...
题目链接: http://codeforces.com/problemset/problem/383/C 题意: 给出一颗有n个节点,且1为根节点的树,每个节点有它的权值,现在进行m次操作,操作分为添加和查询,当一个节点的权值添加v,则它的孩子节点的权值要添加-v,它的孩子的孩子节点+v, 以此类推
c语言刷 DFS题记录,144.二叉树的前序遍历/***Definitionforabinarytreenode.*structTreeNode{*intval;*structTreeNode*left;*structTreeNode*right;*};*//***...
在计算机科学， 图遍历（Tree Traversal，也称图搜索）是一系列图搜索的算法， 是单次访问树结构类型数据（tree data structure)中每个节点以便检查或更新的一系列机制。图遍历算法可以按照节点访问顺序进行分类，根据访问目的或使用场景的不同，算法大致可分为28种：图遍历即以特定方式访问图中所有节点，...
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Dynamic DFS Tree in ADOPT-ing. In AAAI Conference on Artificial Intelligence, pages 763-769. AAAI Press, 2007.Silaghi, M.-C. and Yokoo, M. (2007). Dynamic DFS tree in ADOPT-ing. In Proceedings of the Twenty-Second AAAI Conference on Artificial Intelligence (AAAI'07), pages 763-769, ...
Codeforces 383C . Propagating tree【树阵,dfs】 标题效果: 有一棵树,有两种操作模式对本树:1:表示为(1 x val),在NOx加在节点上val,然后x每个节点加上儿子- val。给每个儿子一个儿子在一起-(- val),加到没有儿子为止。2:表示为(2 x)查询x节点上的值。