import sys
input = lambda :sys.stdin.readline()[:-1]
ni = lambda :int(input())
na = lambda :list(map(int,input().split()))
sys.setrecursionlimit(10**7)
yes = lambda :print("yes");Yes = lambda :print("Yes")
no = lambda :print("no");No = lambda :print("No")
#######################################################################

n = 9
ni()
c = na()
ans = []
for i in range(8,-1,-1):
    for j in range(c[i]):
        ans.append(str(i+1))

print("".join(ans))