import sys
input = lambda :sys.stdin.readline()[:-1]
ni = lambda :int(input())
na = lambda :list(map(int,input().split()))
yes = lambda :print("yes");Yes = lambda :print("Yes");YES = lambda : print("YES")
no = lambda :print("no");No = lambda :print("No");NO = lambda : print("NO")
#######################################################################
n, k = na()
a = na()
mod = 998244353
def f(k):
    ans = 1
    for i in range(n):
        ans *= min(k, a[i])
        ans %= mod
        ans *= pow(a[i], mod-2, mod)
        ans %= mod
    return ans

print((f(k) - f(k-1)) % mod)