#include <iostream>
#include <vector>
#include <algorithm>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
using ll = long long;
using mint = modint998244353;
using vi = vector<int>;
using vvi = vector<vi>;
using vvvi = vector<vvi>;
using vll = vector<ll>;
using vvll = vector<vll>;
using vvvll = vector<vvll>;
using vmi = vector<mint>;
using vvmi = vector<vmi>;
using vvvmi = vector<vvmi>;
#define all(a) (a).begin(), (a).end()
#define rep2(i, m, n) for (int i = (m); i < (n); ++i)
#define rep(i, n) rep2(i, 0, n)
#define drep2(i, m, n) for (int i = (m)-1; i >= (n); --i)
#define drep(i, n) drep2(i, n, 0)

int main(){
    ios::sync_with_stdio(false);
    std::cin.tie(nullptr);
    int n, m; cin >> n >> m;
    vi a(n); rep(i, n)cin >> a[i];
    dsu d(n);
    rep(i, m){
        int u, v; cin >> u >> v;
        d.merge(u-1, v-1);
    }
    vvi g = d.groups();
    mint ans = 1;
    for(auto v : g){
        mint tmp = 0;
        for(auto i : v)tmp += mint(a[i]);
        ans *= tmp.pow(v.size());
    }
    cout << ans.val() << endl;

    return 0;
}