#include <bits/stdc++.h>
using namespace std;

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    int N,M; cin >> N >> M;
    vector<long long> A(N);
    for(auto &a : A) cin >> a;
    long long mod = 998244353;

    vector<vector<long long>> Graph(N);
    for(int i=0; i<M; i++){
        int u,v; cin >> u >> v;
        u--; v--;
        Graph.at(u).push_back(v);
        Graph.at(v).push_back(u);
    }

    vector<bool> visited(N);
    long long answer = 1;  
    for(int i=0; i<N; i++){
        if(visited.at(i)) continue;
        visited.at(i) = true;

        long long now = 0,siz = 0;
        queue<int> Q; Q.push(i);
        while(Q.size()){
            int pos = Q.front(); Q.pop();
            now += A.at(pos); siz++;
            for(auto to : Graph.at(pos)){
                if(visited.at(to)) continue;
                visited.at(to) = true;
                Q.push(to);
            }
        }
        
        for(int k=0; k<siz; k++) answer = answer*now %mod;
        
    }
    cout << answer << endl;
}