N = int(input())
A = list(input().split())
M = 65
for i in range(N):
    A[i] = [A[i] + "1" * (M - len(A[i])), len(A[i])]
A.sort()
for i in range(N):
    A[i] = A[i][0][:A[i][1]]

ans = 0
mod = 998244353
for a in A:
    ans *= pow(10, len(a), mod)
    ans += int(a)
    ans %= mod
    
print(ans)