import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines

N,X,*A = map(int,read().split())

Aplus = [x + 1 for x in A]

p = 1
for x in Aplus:
    p *= x
    if p > X + 100:
        break
p -= 1

if p > X:
    answer = '0' * X
    print(answer)
    exit()

if any(x == 1 for x in A):
    if N == 1:
        answer = '1' + (X - 1)
    else:
        # p 以上が全部作れる
        answer = '0' * (p - 1) + '1' * (X - p + 1)
    print(answer)
    exit()

# RE
raise