Pagini recente » Cod sursa (job #2229152) | Cod sursa (job #1156292) | Cod sursa (job #1515674) | Cod sursa (job #2782747) | Cod sursa (job #2064240)
import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.PriorityQueue;
import java.util.StringTokenizer;
public class Main {
static int n;
static int m;
static List<Edge>[] g;
static int[] dist;
static boolean[] vis;
static class Edge {
int to;
int cost;
Edge(int to, int cost) {
this.to = to;
this.cost = cost;
}
}
public static void main(String[] args) throws FileNotFoundException, IOException {
BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream("dijkstra.in")));
PrintWriter out = new PrintWriter(new FileOutputStream("dijkstra.out"));
String[] parts = br.readLine().split(" ");
n = Integer.parseInt(parts[0]);
m = Integer.parseInt(parts[1]);
g = new List[n];
dist = new int[n];
vis = new boolean[n];
// Arrays.fill(g, new ArrayList<>());
for (int i = 0; i < n; i++) {
g[i] = new ArrayList<>();
}
Arrays.fill(dist, Integer.MAX_VALUE);
Arrays.fill(vis, false);
dist[0] = 0;
for (int i = 0; i < m; i++) {
parts = br.readLine().split(" ");
int from = Integer.parseInt(parts[0]) - 1;
int to = Integer.parseInt(parts[1]) - 1;
int cost = Integer.parseInt(parts[2]);
g[from].add(new Edge(to, cost));
// out.println(from + ", " + to + ", " + cost);
}
PriorityQueue<Long> pq = new PriorityQueue<>();
pq.add(0L);
while (!pq.isEmpty()) {
long entry = pq.remove();
int node = (int) entry;
for (int j = 0; j < g[node].size(); j++) {
if (dist[node] + g[node].get(j).cost < dist[g[node].get(j).to]) {
dist[g[node].get(j).to] = dist[node] + g[node].get(j).cost;
pq.add(((1L * dist[g[node].get(j).to]) << 32) + g[node].get(j).to);
}
}
}
for (int i = 1; i < n; i++) {
if (dist[i] < Integer.MAX_VALUE) {
out.print(dist[i] + " ");
} else {
out.print("0 ");
}
}
out.println();
// for(int i=0; i<n; i++) {
// out.print(i + " -> ");
// for(int j=0; j<g[i].size(); j++)
// out.print(g[i].get(j).to + ", ");
// out.println();
// }
out.close();
}
static class InputReader {
private BufferedReader reader;
private StringTokenizer tokenizer;
InputReader(InputStream stream) {
reader = new BufferedReader(new InputStreamReader(stream), 65536);
tokenizer = null;
}
private String nextToken() {
while (tokenizer == null || !tokenizer.hasMoreTokens()) {
try {
tokenizer = new StringTokenizer(reader.readLine());
} catch (IOException e) {
throw new RuntimeException(e);
}
}
return tokenizer.nextToken();
}
int nextInt() {
return Integer.parseInt(nextToken());
}
String nextString() {
return nextToken();
}
}
}