import sys
readline = sys.stdin.readline
from collections import *

N, Q = map(int, readline().split())
G = [[] for i in range(N)]
ans = 1
mod = 998244353
for i in range(Q):
    A, B, C = map(int, readline().split())
    A, B = A - 1, B - 1
    G[A].append((B, C))
    G[B].append((A, C))
    
D = deque()
dist = [-1] * N
for i in range(N):
    if dist[i] != -1:
        continue
    ans *= 2
    ans %= mod
    D.append(i)
    dist[i] = 0
    while D:
        u = D.popleft()
        for v, c in G[u]:
            if dist[v] == -1:
                dist[v] = (dist[u] + c) % 2
                D.append(v)
            else:
                if dist[v] != (dist[u] + c) % 2:
                    print(0)
                    exit()
print(ans)