#include <bits/stdc++.h>
#include <atcoder/all>

using namespace std;
using namespace atcoder;

struct Fast {
  Fast() {
    std::cin.tie(nullptr);
    ios::sync_with_stdio(false);
    cout << setprecision(10);
  }
} fast;

#define rep(i, a, b) for (int(i) = (a); (i) < (int)(b); (i)++)

using mint = modint998244353;

int main() {
  int n, m;
  cin >> n >> m;

  vector<int> a(n);
  rep(i, 0, n) cin >> a[i];

  vector<vector<int>> g(n, vector<int>());
  rep(i, 0, m) {
    int u, v;
    cin >> u >> v;
    u--;
    v--;
    g[u].push_back(v);
    g[v].push_back(u);
  }

  vector<bool> seen(n, false);
  vector<int> root(n, -1), size(n, 0);
  vector<mint> sum(n, 0);
  stack<int> st;
  rep(i, 0, n) st.push(i);
  while (!st.empty()) {
    int x = st.top();
    st.pop();
    if (seen[x]) continue;
    seen[x] = true;
    if (root[x] == -1) root[x] = x;
    sum[root[x]] += a[x];
    size[root[x]]++;
    for (auto y : g[x]) {
      if (root[y] != -1) continue;
      root[y] = root[x];
      st.push(y);
    }
  }

  mint ans = 1;
  rep(i, 0, n) {
    if (root[i] != i) continue;
    rep(j, 0, size[i]) ans *= sum[i];
  }
  cout << ans.val() << endl;
}