import sys
from collections import deque
input=sys.stdin.readline
write=sys.stdout.write

N,M=map(int,input().split())
E=[[] for _ in range(N+1)]
for _ in range(M):
    a,b=map(int,input().split())
    y=int(input())

    E[a].append((b,y))
    E[b].append((a,y))

X=[-1]*(N+1)
for v in range(1,N+1):
    if X[v]!=-1:
        continue

    X[v]=0
    Q=deque([v])
    while Q:
        w=Q.popleft()

        for u,y in E[w]:
            if X[u]==-1:
                X[u]=X[w]^y
                Q.append(u)
            elif X[w]^X[u]!=y:
                print(-1)
                exit()

write("\n".join(map(str,X[1:])))