N = int(input())
L = list(map(int,input().split()))
l = []
for i in range(N):
    l.append([L[i],i])
    
l.sort()

left = l[0][1]
right = l[0][1]

ans = 1
mod = 998244353

for i in range(1,N):
    if l[i][1] < left:
        left = l[i][1]
    elif l[i][1] > right:
        right = l[i][1]
    else:
        ans *= (right - left - i + 1)
        ans %= mod
print(ans)