BellamFord algorithm
import java.util.*;
public class BellamFordAlgorithm {
static class Edge {
int src;
int dest;
int wt;
public Edge(int src, int dest, int wt) {
this.src = src;
this.dest = dest;
this.wt = wt;
}
}
public static void Create(ArrayList<Edge> graph[]) {
for (int i = 0; i < graph.length; i++) {
graph[i] = new ArrayList<>();
}
graph[0].add(new Edge(0, 1, 2));
graph[0].add(new Edge(0, 2, 4));
graph[1].add(new Edge(1, 2, -4));
graph[2].add(new Edge(2, 3, 2));
graph[3].add(new Edge(3, 4, 4));
graph[4].add(new Edge(4, 1, -1));
}
public static void BellamFord(ArrayList<Edge> graph[], int src, int V) {
int dist[] = new int[graph.length];
for (int i = 0; i < dist.length; i++) {
if (i != src) {
dist[i] = Integer.MAX_VALUE;
}
}
for (int i = 0; i < V - 1; i++) {
for (int j = 0; j < graph.length; j++) {
for (int k = 0; k < graph[j].size(); k++) {
Edge e = graph[j].get(k);
int u = e.src;
int v = e.dest;
int wt = e.wt;
if (dist[u] + wt < dist[v] && dist[u] != Integer.MAX_VALUE) {
dist[v] = dist[u] + wt;
}
}
}
}
System.out.println("The shortest path:");
for (int i = 0; i < dist.length; i++) {
System.out.print(dist[i] + " ");
}
}
public static void main(String[] args) {
int v = 5;
ArrayList<Edge> graph[] = new ArrayList[v];
Create(graph);
BellamFord(graph, 0, v);
}
}
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