#include <stdio.h>

typedef struct list {
  int v;
  struct list *n;
} list;

typedef struct tree {
  int v;
  struct tree *p;
} tree;

tree *get_root (tree *t) {
  if (t == NULL || t->p == NULL) {
    return t;
  }
  
  t->p = get_root(t->p);
  return t->p;
}

int func (int v, int b, list **e, int *flag, int *visited) {
  list *l = e[v];
  
  if (visited[v] > 0 && flag[v] != b) {
    return -1;
  } else if (visited[v] > 0) {
    return 1;
  }
  
  visited[v] = 1;
  flag[v] = b;
  while (l != NULL) {
    if (func(l->v, 1-b, e, flag, visited) < 0) {
      return -1;
    }
    l = l->n;
  }
  
  return 1;
}

int main () {
  int n = 0;
  int q = 0;
  int a[100000] = {};
  int b[100000] = {};
  int c[100000] = {};
  
  int res = 0;
  
  long long ans = 1LL;
  long long mod_num = 998244353LL;
  
  tree t[100000] = {};
  
  list pool[200000] = {};
  int used = 0;
  
  list *e[100000] = {};
  int flag[100000] = {};
  int visited[100000] = {};
  
  res = scanf("%d", &n);
  res = scanf("%d", &q);
  for (int i = 0; i < q; i++) {
    res = scanf("%d", a+i);
    res = scanf("%d", b+i);
    res = scanf("%d", c+i);
    a[i]--;
    b[i]--;
  }
  
  for (int i = 0; i < n; i++) {
    t[i].v = i;
    t[i].p = NULL;
  }
  
  for (int i = 0; i < q; i++) {
    if (c[i] == 0) {
      tree *rt1 = get_root(t+a[i]);
      tree *rt2 = get_root(t+b[i]);
      if (rt1 != rt2) {
        rt2->p = rt1;
      }
    }
  }
  
  for (int i = 0; i < q; i++) {
    if (c[i] == 1) {
      tree *rt1 = get_root(t+a[i]);
      tree *rt2 = get_root(t+b[i]);
      if (rt1 == rt2) {
        ans = 0LL;
      } else {
        pool[used].v = rt2->v;
        pool[used].n = e[rt1->v];
        e[rt1->v] = pool+used;
        used++;
        pool[used].v = rt1->v;
        pool[used].n = e[rt2->v];
        e[rt2->v] = pool+used;
        used++;
      }
    }
  }
  
  for (int i = 0; i < n; i++) {
    if (t[i].p == NULL && visited[i] <= 0) {
      if (func(i, 0, e, flag, visited) < 0) {
        ans = 0LL;
      } else {
        ans *= 2LL;
        ans %= mod_num;
      }
    }
  }
  
  printf("%lld\n", ans);
  return 0;
}