Bellman-Ford algorithm: solving the shortest path problem

The Bellman-Ford algorithm is a single-source shortest path algorithm based on relaxation operation, which can calculate the shortest path from the source node to all other nodes. Unlike Dijkstra’s algorithm, the Bellman-Ford algorithm can handle graphs containing negative weight edges. The algorithm gradually updates the shortest path estimate of the node in an iterative manner […]

[Algorithm Challenge] The shortest distance between characters (including parsing and source code)

821.The shortest distance between characters https://leetcode-cn.com/problems/shortest-distance-to-a-character/ 821.The shortest distance between characters Question description Solution 1: Center expansion method Ideas Complexity analysis Code (JS/C++) Solution 2: Exchange space for time Ideas Complexity analysis Code (JS/C++) Solution 3: Greedy Ideas Complexity analysis Code (JS/C++/Python) Solution 4: Window Ideas Complexity analysis Code (JS/C++/Python) Title description Given a string […]

Algorithm Issues in Communication Networks Experiment 3 Shortest Path Algorithm Experiment

Experiment 3 Algorithm Issues in Communication Networks-Shortest Path Algorithm Experiment 1. Introduction Single source shortest path problem: Given a weighted directed graph G = (V, E), the weight of each edge is a real number. In addition, a vertex in V is also given, called the source. To calculate the shortest path length from the […]

Applications of Graphs 2.0—–Shortest Path Problem (Dijkstra and Floyd Algorithm)

Table of Contents Preface shortest path Dijkstra’s algorithm 1. Algorithm steps 2. Code implementation 3. Algorithm analysis Floyd’s algorithm 1. Algorithm steps 2. Code implementation 3. Algorithm analysis Foreword Today we continue to study the application of graphs, the shortest path problem. The so-called shortest path is to find the shortest path from one point […]

Dijkstra’s algorithm – solving the shortest path of a weighted directed undirected graph

Dijkstra’s Algorithm, also known as Dijkstra’s algorithm, is an algorithm used to solve the shortest path problem of weighted directed graphs or undirected graphs. This algorithm was invented by Dutch computer scientist Edsgel Dijkstra in 1956. It is an algorithm widely used in network routing and other fields. In a 2001 interview, Dr. Dijkstra revealed […]