#include<iostream>
#include<stdio.h>
#include<vector>
using namespace std;
const int N=2e5+1;
vector<long long> g[N];
bool flag=true;
long long a,b,u,v,sum=1;
short vis[N];
void get(long long id,long long fa)
{
	if(!flag)return ;
	for(int i=0;i<g[id].size();i++)
	{
		if(g[id][i]!=fa)
		{
			if(vis[g[id][i]]==0)
			{
				vis[g[id][i]]=vis[id]==1?2:1;
				get(g[id][i],id);
			}
			if(vis[g[id][i]]==vis[id])
			{
//				cout<<vis[g[id][i]]<<" "<<g[id][i]<<" "<<id<<"\n";
				flag=false;
				return ;
			}
		}
	}
	return ;
}
int main()
{
	scanf("%lld%lld",&a,&b);
	for(int i=1;i<=b;i++)
	{
		scanf("%lld%lld",&u,&v);
		g[u].push_back(v);
		g[v].push_back(u);
	}
	for(int i=1;i<=a;i++)
	{
		if(vis[i]==0)
		{
			vis[i]=1;
			get((long long)i,(long long)i);
			sum=(sum*2)%998244353;
		}
		if(flag==false)
		{
			printf("0");
			return 0;
		}
	}
	printf("%lld",sum);
	return 0;
}