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Double ended queue wide search is a kind of Dijkstra algorithm, which mainly solves the shortest path problem in which the weight of the edge in the graph is only 0 or 1. Operation: Every time you take out elements from the team head and expand other elements 1. If the edge weight of an extended element is 0, the element is inserted into ...

catalogue Concept of graph Storage mode of graph adjacency matrix Title: adjacency matrix representation of Graphs Adjacency table Title: the forward star of a graph represents 1 ergodic Depth first search Breadth first search Shortest path algorithm Dijkstra algorithm Title: Party Bellman Ford algorithm SPFA algorithm Title: ma ...

The basic graph theory algorithms are summarized here: Summary of basic graph theory algorithms (shortest path, minimum spanning tree, bipartite graph) LCA Upward marking method Time complexity O ( n ∗ m ...

Let's take a look at the definition given by Du Niang: And look up the set. In some set application problems with N elements, we usually make each element form a single element set at the beginning, and then merge the sets of elements belonging to the same group in a certain order. In the meantime, we should repeatedly find out which set an ...

Notice before reading Key points introduction and brief statement. The seventh computer question is be ing updated Topic content Problem description The main office and scientific research buildings of Beihang include new main building, Yifu Building, such as heart building, office building, library, main building, building 1, etc;. Be ...

Euler loop / Bridge Title Link: YBT2022 winter vacation Day3 B / LOJ 2460 General idea of the topic Give you a picture, the side is two-way, and the cost of walking on both sides is different. You should choose some edges to walk, and then form an Euler loop, and the maximum cost of the selected edge is the least. To output this cost and the ...

Prim algorithm Prim algorithm is an algorithm to find the minimum spanning tree (mst) through the connected network Process: 1. Firstly, select any vertex as the root of the tree 2. Traverse other vertices (not in the tree). For each vertex, find an edge with the shortest path to mst. In this way, each vertex has an edge to mst (if it is not a ...

Title Description Arrange 1 ∼ n in order to form a sequence. The number I is just in position i. Then give a position sequence p1,p2,..., pn with length N, which is an arrangement of 1 ∼ n. Next, we will repeatedly perform the following operations on the sequence: Rearrange the position of each number in the sequence and move the nu ...

E. Fair Share [Link](Problem - E - Codeforces) meaning of the title Here you are m m m arrays and two multiple sets L , R L, R 50. R, i ...

Problem classification and introduction n represents the number of points and m represents the number of edges The focus of the investigation of the shortest path problem in the algorithm problem is not to prove the correctness of the algorithm, and the principle requirements of the algorithm are not high. The focus of the investigation is ho ...