from functools import cmp_to_key
def cmp(a, b):
    if a + b > b + a:
      s = 1
    elif a + b == b + a:
      s = 0
    else:
      s = -1
    return 1 if s > 0 else -1 if s < 0 else 0

N = int(input())
A = list(map(str,input().split()))
A.sort(key = cmp_to_key(cmp))

ans = 0
mod = 998244353
for i in range(N):
  d = len(A[i])
  ans *= pow(10,d,mod)
  ans %= mod
  ans += int(A[i])
  ans %= mod
print(ans)