# Enter your code here. Read input from STDIN. Print output to STDOUT
class Graph:
  def __init__(self):
    self.nodes = set()
    self.edges = defaultdict(list)
    self.distances = {}

  def add_node(self, value):
    self.nodes.add(value)

  def add_edge(self, from_node, to_node, distance):
    self.edges[from_node].append(to_node)
    self.edges[to_node].append(from_node)
    self.distances[(from_node, to_node)] = distance


def dijsktra(graph, initial):
  visited = {initial: 0}
  path = {}

  nodes = set(graph.nodes)

  while nodes:
    min_node = None
    for node in nodes:
      if node in visited:
        if min_node is None:
          min_node = node
        elif visited[node] < visited[min_node]:
          min_node = node

    if min_node is None:
      break

    nodes.remove(min_node)
    current_weight = visited[min_node]

    for edge in graph.edges[min_node]:
      weight = current_weight + graph.distance[(min_node, edge)]
      if edge not in visited or weight < visited[edge]:
        visited[edge] = weight
        path[edge] = min_node

  return visited, path

text= raw_input()
nums = [int(n) for n in text.split()]
towns = nums[0]
linenums = nums[1]
graph1.__init__(self)
for i in range(0,towns):
    graph1.add_node(self, i)


for i in range(0,linenums):
    temp = raw_input()
    bits = [int(n) for n in temp.split()]
    graph1.add_edge(self, bits[0], bits[1], bits[2])

for i in range(0,towns):
    route = dijsktra(graph1, i)
    print(route)