import sys
#sys.setrecursionlimit(1000000)
input = sys.stdin.readline
def mp():return map(int,input().split())
def lmp():return list(map(int,input().split()))
import math
import bisect
from copy import deepcopy as dc
from itertools import accumulate
from collections import Counter, defaultdict, deque
import itertools
def ceil(U,V):return (U+V-1)//V
def modf1(N,MOD):return (N-1)%MOD+1
inf = int(1e10)
mod = int(1e9+7)

n = int(input())
c = lmp()
ans = []
for i in range(9):
    for j in range(c[i]):
        ans.append(str(i+1))
ans.reverse()
print("".join(ans))