from functools import cmp_to_key

MOD = 998244353

N = int(input())
A = list(map(int, input().split()))

def compare(left, right):
    L, R = str(left), str(right)
    for i in range(len(L)+len(R)):
        l, r = -1, -1
        if i < len(L):
            l = int(L[i])
        else:
            l = int(R[i-len(L)])
        if i < len(R):
            r = int(R[i])
        else:
            r = int(L[i-len(R)])
        if l < r:
            return -1
        if l > r:
            return 1
    return 0

A.sort(key=cmp_to_key(compare))
POW = [1]
for _ in range(20):
    POW.append(POW[-1]*10%MOD)
ans = 0
for a in A:
    l = len(str(a))
    ans = ((ans*POW[l])+a)%MOD

print(ans)