public static void main(String[] args) {
In in = new In("jobsPC1.txt");
int N = in.readInt();
in.readLine();
EdgeWeightedDigraph G;
G = new EdgeWeightedDigraph(2 * N + 2);
int s = 2 * N, t = 2 * N + 1;
for (int i = 0; i < N; ++i) {
String[] a = in.readLine().split("\\s+");
double duration = Double.parseDouble(a[0]);
G.addEdge(new DirectedEdge(i, i + N, duration));
G.addEdge(new DirectedEdge(s, i, 0.0));
G.addEdge(new DirectedEdge(i + N, t, 0.0));
for (int j = 1; j < a.length; ++j) {
G.addEdge(new DirectedEdge(i + N, Integer.parseInt(a[j]), 0));
}
}
StdOut.println(G);
MyAcyclicLP lp = new MyAcyclicLP(G, s);
StdOut.println("Start times: ");
for (int i = 0; i < N; ++i) StdOut.printf("%4d: %5.1f\n", i, lp.distTo(i));
StdOut.printf("%5.1f\n", lp.distTo(t));
for (DirectedEdge e : lp.pathTo(t)) {
StdOut.print(e + " ");
}
StdOut.println();
}
public static void main(String[] args) {
// create random DAG with V vertices and E edges; then add F random edges
int V = Integer.parseInt(args[0]);
int E = Integer.parseInt(args[1]);
int F = Integer.parseInt(args[2]);
EdgeWeightedDigraph G = new EdgeWeightedDigraph(V);
int[] vertices = new int[V];
for (int i = 0; i < V; i++) vertices[i] = i;
StdRandom.shuffle(vertices);
for (int i = 0; i < E; i++) {
int v, w;
do {
v = StdRandom.uniform(V);
w = StdRandom.uniform(V);
} while (v >= w);
double weight = Math.random();
G.addEdge(new DirectedEdge(v, w, weight));
}
// add F extra edges
for (int i = 0; i < F; i++) {
int v = (int) (Math.random() * V);
int w = (int) (Math.random() * V);
double weight = Math.random();
G.addEdge(new DirectedEdge(v, w, weight));
}
StdOut.println(G);
// find a directed cycle
EdgeWeightedDirectedCycle finder = new EdgeWeightedDirectedCycle(G);
if (finder.hasCycle()) {
StdOut.print("Cycle: ");
for (DirectedEdge e : finder.cycle()) {
StdOut.print(e + " ");
}
StdOut.println();
}
// or give topologial sort
else {
StdOut.println("No directed cycle");
}
}
private boolean findNegativeCycle(){
int V = edgeTo.length;
EdgeWeightedDigraph spt;
spt = new EdgeWeightedDigraph(V);
for (int v = 0 ; v < V ; v++ ) {
if(edgeTo[v] !=null)
spt.addEdge(edgeTo[v]);
}
EdgeWeightedCycleFinder cf ;
cf = new EdgeWeightedCycleFinder(spt);
cycle = cf.cycle();
}
private void findNegativeCycle(){
int V = edgeTo.length;
EdgeWeightedDigraph spt ;
spt = new EdgeWeightedDigraph;
for (int v = 0 ; v < V ; v++ ) {
if(edgeTo[v] !=null ){
spt.addEdge(edgeTo[v]);
}
}
EdgeWeightedCycleFinder cf;
cf = new EdgeWeightedCycleFinder(spt);
cycle = cf.cycle();//cycle()方法来自4.2界
}
public static void main(String[] args){
int N = StdIn.readInt();StdIn.readLine();
EdgeWeightedDigraph G ;
G = new EdgeWeightedDigraph(2*N+2);
int s = 2*N ,t = 2*N+1;
for(int i = 0 ; i < N ; i++){
String[] a = StdIn.readLine().split("\\s+");
double duration = Double.parseDouble(a[0]);
G.addEdge(new DirectedEdge(i,i+N,duration));
G.addEdge(new DirectedEdge(s,i,0.0));
G.addEdge(new DirectedEdge(i+N,t,0.0));
for(int j = 1 ; j < a.length ; j++){
int sucessor = Integer.parseInt(a[j]);
G.addEdge(new DirectedEdge(i+N,sucessor,0.0));
}
}
AcyclicSP lp = new AcyclicSP(G,s);
StdOut.println("START TIME:");
for(int i = 0 ; i < N ; i++){
StdOut.printf("%4d:%5.1f\n",i,lp.distTo(i));
StdOut.printf("finish time :%5.1f\n",lp.distTo(t));
}
}
/**
* Reads the precedence constraints from standard input and prints a feasible schedule to standard
* output.
*/
public static void main(String[] args) {
// number of jobs
int N = StdIn.readInt();
// source and sink
int source = 2 * N;
int sink = 2 * N + 1;
// build network
EdgeWeightedDigraph G = new EdgeWeightedDigraph(2 * N + 2);
for (int i = 0; i < N; i++) {
double duration = StdIn.readDouble();
G.addEdge(new DirectedEdge(source, i, 0.0));
G.addEdge(new DirectedEdge(i + N, sink, 0.0));
G.addEdge(new DirectedEdge(i, i + N, duration));
// precedence constraints
int M = StdIn.readInt();
for (int j = 0; j < M; j++) {
int precedent = StdIn.readInt();
G.addEdge(new DirectedEdge(N + i, precedent, 0.0));
}
}
// compute longest path
AcyclicLP lp = new AcyclicLP(G, source);
// print results
StdOut.println(" job start finish");
StdOut.println("--------------------");
for (int i = 0; i < N; i++) {
StdOut.printf("%4d %7.1f %7.1f\n", i, lp.distTo(i), lp.distTo(i + N));
}
StdOut.printf("Finish time: %7.1f\n", lp.distTo(sink));
}