#include <bits/stdc++.h>
using namespace std;
int main(int, char const *[])
{
#ifdef HERITAGE_OFFICIAL
  freopen("_data.in", "r", stdin);
  // freopen("_data.out", "w", stdout);
#endif
  int n, m;
  const int MOD = 998244353;
  cin >> n >> m;
  vector<vector<int>> G(n + 1);
  vector<int> color(n + 1);
  for (int i = 1; i <= m; i++)
  {
    int u, v;
    cin >> u >> v;
    G[u].push_back(v);
    G[v].push_back(u);
  }
  function<bool(int, int)> dfs = [&](int u, int c)
  {
    color[u] = c;
    for (auto v : G[u])
    {
      if (color[v] == c)
        return false;
      else if (color[v] == -1)
      {
        if (!dfs(v, c ^ 1))
          return false;
      }
    }
    return true;
  };
  for (int i = 1; i <= n; i++)
    color[i] = -1;
  long long ans = 1LL;
  for (int u = 1; u <= n; u++)
  {
    if (color[u] != -1)
      continue;
    if (!dfs(u, 0))
    {
      cout << 0;
      return 0;
    }
    ans = (ans << 1) % MOD;
  }
  cout << ans;
  return 0;
}