package main

import . "fmt"
import . "os"
import bf "bufio"

func main() {
	rd := bf.NewReader(Stdin)
	var n, m int
	Fscan(rd,&n,&m)
	a := make([]int, n+1)
	for i := range a[1:] {
		Fscan(rd,&a[i+1])
	}
	g := make([][]int, n+1)
	for i := 0; i < m; i++ {
		var u,v int
		Fscan(rd,&u,&v)
		g[u] = append(g[u], v)
		g[v] = append(g[v], u)
	}
	score := make([]int, n+1)
	visited := make([]int, n+1)
	const Mod = 998244353
	ans := 1
	for i := 1; i <= n; i++ {
		if visited[i] > 0 {
			ans = ans*score[visited[i]]%Mod
			continue
		}
		visited[i] = i
		score[i] = a[i]%Mod
		stk := []int{i}
		for len(stk) > 0 {
			l := len(stk)-1
			p := stk[l]
			stk = stk[:l]
			for _, e := range g[p] {
				if visited[e] > 0 {
					continue
				}
				visited[e] = i
				score[i] = (score[i]+a[e])%Mod
				stk = append(stk, e)
			}
		}
		ans = ans*score[i]%Mod
	}
	Println(ans)
	
}