N,M = map(int,input().split())
A = [-1] + list(map(int,input().split()))
mod = 998244353

G = []
for i in range(N+1):
    G.append([])

for i in range(M):
    U,V = map(int,input().split())
    G[U].append(V)
    G[V].append(U)

from collections import deque

def renketu_seibunsuu():
    number_of_renketu = 0 #連結成分数
    number_of_visited = 0 #訪問済み頂点
    renketu_dict = {} #最後に関数が返す辞書

    visited = [False]*(N+1)

    edge = 0
    for ii in range(10_000_000): #連結成分数が1000万を超えそうなときは要調整
        QQ = deque()
        renketu_dict[ii] = []

        for i in range(edge+1,len(visited)):
            if i == 0:
                continue
            if visited[i] == False:
                QQ.append(i)
                visited[i] = True
                number_of_visited+=1
                renketu_dict[ii].append(i)
                edge = i
                break

        while len(QQ)>0:
            tmp = QQ.popleft()
            for j in G[tmp]:
                if visited[j] == False:
                    visited[j] = True
                    QQ.append(j)
                    number_of_visited+=1
                    renketu_dict[ii].append(j)

        if number_of_visited >= N:
            break
    
    return renketu_dict

ren_seibun = renketu_seibunsuu()

ans = 1
for ind,nex in ren_seibun.items():
    tmp = 0
    for ii,vv in enumerate(nex):
        tmp += A[vv]
    
    ans *= pow(tmp,len(nex),mod)
    ans %= mod

print(ans%mod)