#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
using ll=long long;
using mint=modint998244353;

int main()
{
    int n,m;
    cin>>n>>m;
    vector<mint> a(n);
    for(int i=0;i<n;i++){
        int t;
        cin>>t;
        a[i]=t;
    }
    vector<vector<int>> graph(n);
    for(int i=0;i<m;i++){
        int u,v;
        cin>>u>>v;
        u--;v--;
        graph[u].push_back(v);
        graph[v].push_back(u);
    }

    vector<mint> sum;
    vector<vector<int>> hist;
    vector<bool> seen(n);
    function<void(int,int)> rec=[&](int i,int t)->void{
        seen[i]=true;
        sum[t]+=a[i];
        hist[t].push_back(i);
        for(int x:graph[i]){
            if(!seen[x])rec(x,t);
        }

    };
    int cnt=0;
    for(int i=0;i<n;i++){
        if(seen[i])continue;
        cnt++;
        sum.push_back(0);
        hist.push_back(vector<int>());
        rec(i,cnt-1);
    }

    mint ans=1;
    for(int i=0;i<cnt;i++){
        for(int j=0;j<hist[i].size();j++)ans*=sum[i];
    }
    cout<<ans.val()<<endl;
}