#include <bits/stdc++.h>
using namespace std;
#define int long long
const int mod = 998244353;
int n, m, w[100010], deg[100010], vis[100010];
pair<int, int> e[100010];
vector<int> a[100010];
signed main() {
	ios::sync_with_stdio(false);
	cin.tie(0), cout.tie(0);
	cin >> n >> m;
	for (int i = 1; i <= n; i++)
		cin >> w[i];
	for (int i = 1; i <= m; i++) {
		cin >> e[i].first >> e[i].second, e[i].first++, e[i].second++;
		deg[e[i].first]++, deg[e[i].second]++;
	}
	for (int i = 1; i <= m; i++) {
		int u, v;
		tie(u, v) = e[i];
		if (make_pair(deg[u], u) < make_pair(deg[v], v))
			a[u].push_back(v);
		else a[v].push_back(u);
	}
	int ans = 0;
	for (int i = 1; i <= n; i++) {
		for (int v : a[i])
			vis[v] = 1;
		for (int v : a[i])
			for (int t : a[v])
				if (vis[t]) (ans += w[i] * w[v] % mod * w[t]) %= mod;
	}
	cout << ans << '\n';
	return 0;
}