import sys
sys.setrecursionlimit(10**6)

N, M = map(int, input().split())
A = list(map(int, input().split()))
UV = [list(map(int, input().split())) for _ in range(M)]
MOD = 998244353

G = [[] for _ in range(N)]
for i in range(M):
    u, v = UV[i]
    u -= 1
    v -= 1
    G[u].append(v)
    G[v].append(u)
    
link = [-1] * N

def dfs(now):
    for nxt in G[now]:
        if link[now] == link[nxt]:
            continue
        link[nxt] = link[now]
        dfs(nxt)

cnt = 0
for i in range(N):
    if link[i] != -1:
        continue
    cnt += 1
    link[i] = cnt
    dfs(i)

a = [[0] * 2 for _ in range(cnt)]
for i in range(N):
    a[link[i]-1][0] += A[i]
    a[link[i]-1][1] += 1
    
ans = 1
for x, y in a:
    ans *= x ** y
    ans %= MOD
print(ans)