import sys
sys.setrecursionlimit(500000)
N,M = map(int,input().split())
C = []
G = [[] for _ in range(N)]
for _ in range(M):
    A,B = map(int,input().split())
    A-=1;B-=1
    Y = int(input())
    G[A].append((B,Y))
    G[B].append((A,Y))
    C.append((A,B,Y))

    
used = [0]*N
X = [-1]*N

def dfs(v,par=-1):
    for u,y in G[v]:
        if used[u] == 1:
            if X[v]^X[u] != y:
                print(-1);exit()
        else:
            X[u] = X[v]^y
            used[u] = 1
            dfs(u,v)

for i in range(N):
    if used[i] == 1: continue
    X[i] = 0
    dfs(i)

print(*X,sep="\n")