Search results
The DFS tree and observation 1 are the core of Tarjan's bridge-finding algorithm. Typical tutorials about finding bridges only mention the DFS tree in passing and start by defining weird arrays
A directed DFS tree is an explicit representation of a DFS traversal of a directed graph. When a node is visited for the first time, it is added to the tree, either as a root if it was visited in the beginning of a DFS call, or as the child of the node it got visited from.
6 godz. temu · The idea: Suppose in the input of a problem, you are given a tree as n − 1 n − 1 edges. To construct the XOR Linked Tree data-structure from this, you go through all of the edges and compute the following two things for every node in the tree: deg[node] = The degree of the node. xor[node] = The XOR of all neighbours of the node.
Codeforces Graph Theory/ Problem Solving/ Algorithm Series:This is the first video of my Codeforces Graph Series. This is an introductory tutorial that discu...
22 gru 2022 · Dynamic Programming (DP) on trees is a powerful algorithmic technique commonly used in competitive programming. It involves solving various tree-related problems by efficiently calculating and storing intermediate results to optimize time complexity.
15 lut 2024 · DFS (Depth-first search) is a technique used for traversing trees or graphs. Here backtracking is used for traversal. In this traversal first, the deepest node is visited and then backtracks to its parent node if no sibling of that node exists.
The idea of a bridge tree is to shrink the maximal components without a bridge into one node, leaving only the bridges of the original graph as the edges in the bridge tree. In the above image, the bridges of the graph are marked in red.
