N = int(input())
A = list(map(str,input().split()))
for i in range(N):
  d = len(A[i])
  n = 19 - d
  b = '0' * n
  A[i] = (A[i] + b,-d)
A.sort()
ans = 0
mod = 998244353
for a,d in A:
  d *= -1
  a = a[:d]
  ans *= pow(10,d,mod)
  ans %= mod
  ans += int(a)
  ans %= mod
print(ans)