from collections import defaultdict
from bisect import bisect_left
import sys
input = sys.stdin.readline

n = int(input())
A = list(map(int, input().split()))
mod = 998244353

setA = set()
idx_list = defaultdict(list)
for i in range(n):
    setA.add(A[i])
    idx_list[A[i]].append(i)
sortA = sorted(A)
ans = 1
idx = -1
for a in sortA:
    L = idx_list[a]
    i = bisect_left(L, idx)
    if i == len(L):
        continue
    if idx != -1:
        ans *= L[i] - idx + 1
        ans %= mod
    for j in range(i, len(L) - 1):
        ans *= L[j + 1] - L[j] + 1
        ans %= mod
    idx = L[-1]
print(ans)