Problem:
Single Source Shortest Path

For a given weighted graph G(V, E) and a source r, find the source shortest path to each vertex from the source (SSSP: Single Source Shortest Path).

Input

An edge-weighted graph G (V, E) and the source r.

|V| |E| r
s0 t0 d0
s1 t1 d1
:
s|E|-1 t|E|-1 d|E|-1

|V| is the number of vertices and |E| is the number of edges in G. The graph vertices are named with the numbers 0, 1,..., |V|-1 respectively. r is the source of the graph.

si and ti represent source and target vertices of i-th edge (directed) and di represents the cost of the i-th edge.

Output

Print the costs of SSSP in the following format.

c0
c1
:
c|V|-1

The output consists of |V| lines. Print the cost of the shortest path from the source r to each vertex 0, 1, ... |V|-1 in order. If there is no path from the source to a vertex, print INF.

Constraints

1 ≤ |V| ≤ 100000

0 ≤ di ≤ 10000

0 ≤ |E| ≤ 500000

There are no parallel edges

There are no self-loops

Sample Input 1

4 5 0
0 1 1
0 2 4
1 2 2
2 3 1
1 3 5

Sample Output 1

0
1
3
4

Sample Input 2

4 6 1
0 1 1
0 2 4
2 0 1
1 2 2
3 1 1
3 2 5

Sample Output 2

3
0
2
INF

Solution in Python3 (judge verdict: Accepted)

import heapq
import math


def main():
    nvertices, nedges, s = map(int, input().split())
    edges = [[] for i in range(nvertices)]
    for i in range(nedges):
        u, v, w = map(int, input().split())
        edges[u].append((v, w))
    INF = float('inf')
    hq = []
    for i in range(nvertices):
        heapq.heappush(hq, ((0 if i == s else INF), i))
    heapq.heapify(hq)
    weights = [INF] * nvertices
    weights[s] = 0
    while hq:
        d, u = heapq.heappop(hq)
        if d > weights[u]:
            continue
        for v, w in edges[u]:
            if weights[u] + w < weights[v]:
                weights[v] = weights[u] + w
                heapq.heappush(hq, (weights[v], v))

    for w in weights:
        print("INF" if math.isinf(w) else w)


main()