import sys,random,bisect
from collections import deque,defaultdict
from heapq import heapify,heappop,heappush
from itertools import permutations
from math import gcd,log

input = lambda :sys.stdin.buffer.readline()
mi = lambda :map(int,input().split())
li = lambda :list(mi())

N = int(input())
c = li()

res = []
for i in range(9,0,-1):
    res += [str(i)]*c[i-1]
print("".join(res))