from sys import stdin
input=lambda :stdin.readline()[:-1]

n,q=map(int,input().split())
edge=[[] for i in range(n)]
for _ in range(q):
  a,b,c=map(int,input().split())
  a-=1
  b-=1
  edge[a].append((b,c))
  edge[b].append((a,c))

seen=[-1]*n
mod=998244353
ans=1
for i in range(n):
  if seen[i]!=-1:
    continue
  seen[i]=0
  todo=[i]
  while todo:
    v=todo.pop()
    for u,c in edge[v]:
      if seen[u]==-1:
        seen[u]=seen[v]^c
        todo.append(u)
      elif seen[v]^c!=seen[u]:
        print(0)
        exit()
  ans*=2
  ans%=mod

print(ans%mod)