#include <bits/stdc++.h>
using namespace std;
#include <atcoder/all>
using namespace atcoder;
#define rep(i, n) for(int i=0;i<(n);++i)
#define rep1(i, n) for(int i=1;i<=(n);i++)
#define ll long long
using mint = modint998244353;
using P = pair<ll,ll>;
using lb = long double;
using T = tuple<ll, ll, ll>;
#ifdef LOCAL
#  include <debug_print.hpp>
#  define dbg(...) debug_print::multi_print(#__VA_ARGS__, __VA_ARGS__)
#else
#  define dbg(...) (static_cast<void>(0))
#endif

int main()
{
    int n, m;
    cin >> n >> m;
    vector<int> a(n);
    rep(i,n) cin >> a[i];
    dsu uf(n);
    vector<ll> sum(n);
    rep(i,m){
        int u, v;
        cin >> u >> v;
        --u;--v;
        uf.merge(u,v);
    }
    auto res = uf.groups();
    for(auto vs: res){
        for(int v : vs){
            sum[uf.leader(v)]+=a[v];
        }
    }
    mint ans = 1;
    rep(i,n){
        ans *= sum[uf.leader(i)];
    }
    cout << ans.val() << endl;
    return 0;
}