M = 998244353
n = int(input())
A = [int(_) for _ in input().split()]
A.sort(key=str)
S = 0
for i in range(n):
    a = A[i]
    while a:
        S = (10 * S) % M
        a //= 10
    S = (S + A[i]) % M

print(S)