import sys
input = sys.stdin.readline

from collections import Counter
from functools import lru_cache
@lru_cache(maxsize=None)
def calc(D):
    #print(D)
    if len(D)==0:
        return 0
    ANS=1<<60
    for i in range(len(D)-1):
        x=D[i]
        y=D[i+1]

        if x==y:
            E=D[:i]+D[i+2:]
            ANS=min(ANS,calc(E))
        else:
            E=D[:i]+D[i+2:]

            #print(E)

            score=0
            keta=0
            ix=len(E)//2-1
            jx=len(E)//2
            while ix>=0:
                score+=E[ix]*pow(10,keta)
                score-=E[jx]*pow(10,keta)
                ix-=1
                jx+=1
                keta+=1

            #print(E,score)
                
            score+=(D[i+1]-D[i])*pow(10,keta)

            #print(score)

            ANS=min(ANS,score)

    return ANS
            
            

mod=998244353

N=int(input())
C=list(map(int,input().split()))
C.sort()

SET=set()
ANS=1<<60

if N%2==1:
    D=C[1:]
    score=0
    keta=0
    i=len(D)//2-1
    j=len(D)//2
    while i>=0:
        score+=D[i]*pow(10,keta,mod)
        score-=D[j]*pow(10,keta,mod)
        i-=1
        j+=1
        keta+=1
    score+=C[0]*pow(10,keta,mod)

    print(score%mod)

else:
    C=Counter(C)
    for i in range(1,10):
        if C[i]>=2 and C[i]%2==0:
            C[i]=2
        elif C[i]>=3 and C[i]%2==1:
            C[i]=3

    D=[]
    for c in C:
        for j in range(C[c]):
            D.append(c)

    D.sort()

    print(calc(tuple(D))%mod)