n = int(input())

s = list(map(int, input().split()))
num = [int(x) for x in range(1, 10)]

ans = []

for i in range(9):
    for j in range(s[i]):
        if s[i] > 0:
            ans.append(num[i])
    
for a in sorted(ans, reverse=True):
    print(a, end="")