import sys

N,Q = map(int,input().split())

P = 998244353
G = [[] for _ in range(N)]

for _ in range(Q):
    a,b,c = map(int,input().split())
    a -= 1
    b -= 1
    G[a].append((b,c))
    G[b].append((a,c))

ans = 1
mem = [-1] * N
for i in range(N):
    if mem[i] != -1:continue
    stack = []
    stack.append(i)
    mem[i] = 0
    while stack:
        now = stack.pop()
        for u,c in G[now]:
            if mem[u] == -1:
                mem[u] = mem[now] ^ c
                stack.append(u)
            else:
                if mem[u] != mem[now] ^ c:
                    print(0)
                    exit()
    ans = ans * 2 % P
print(ans)