#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#include<bits/stdc++.h>
#include<atcoder/all>
using namespace std;
using namespace atcoder;
using ll=long long;
using ld=long double;
using T=tuple<ld,ll,ll>;

void IO(){
  ios::sync_with_stdio(false);
  std::cin.tie(nullptr);
}

int main(){
  IO();
  ll n,m;
  cin>>n>>m;
  vector<ll> a(n);
  for(ll i=0;i<n;i++){
    cin>>a[i];
  }
  vector<vector<ll>> G(n);
  for(ll i=0;i<m;i++){
    ll u,v;
    cin>>u>>v;
    u--;
    v--;
    G[u].push_back(v);
    G[v].push_back(u);
  }
  vector<bool> seen(n,false);
  queue<ll> que;
  vector<vector<ll>> v;
  ll idx=0;
  for(ll i=0;i<n;i++){
    if(!seen[i]){
      seen[i]=true;
      que.push(i);
      v.resize(idx+1);
      while(que.size()){
        ll q=que.front();
        que.pop();
        v[idx].push_back(q);
        for(ll u:G[q]){
          if(!seen[u]){
            seen[u]=true;
            que.push(u);
          }
        }
      }
      idx++;
    }
  }
  ll mod=998244353;
  ll ans=1;
  for(ll i=0;i<idx;i++){
    ll tmp=0;
    ll sz=v[i].size();
    for(ll j:v[i]){
      tmp+=a[j];
      tmp%=mod;
    }
    for(ll j=0;j<sz;j++){
      ans*=tmp;
      ans%=mod;
    }
  }
  cout<<ans<<endl;
}