#!/usr/bin/env python
# -*- coding: utf-8 -*-
import itertools

COSTS = (99, 2, 5, 5, 4, 5, 6, 3, 7, 6)


def gen(base_digit, base_cost, base_length, digits, remain):

  number = [base_digit] * base_length
  remain -= base_cost * base_length

  digits = [(d, c - base_cost) for d, c in digits if d != base_digit and c - base_cost <= remain]
  max_repeat = min(remain // min(digits, key=lambda x: x[1])[1], len(number))
  numbers = []

  for repeat in range(1, max_repeat + 1):
    for idxs in itertools.product(range(len(digits)), repeat=repeat):
      if sum(digits[i][1] for i in idxs) != remain:
        continue

    #  replaces = [digits[i][0] for i in idxs]
    #  uppers = [d for d in replaces if d > base_digit]
    #  lowers = [d for d in replaces if d < base_digit]

      num = number[:]

    #  if len(uppers) > 0:
    #    num = uppers + num[len(uppers):]

    #  if len(lowers) > 0:
    #    num = num[:-len(lowers)] + lowers

      numbers.append(num)

  if len(numbers) == 0:
    return False

  number = max(numbers)

  print(''.join(str(d) for d in number))

  return True


def main():
  remain, _ = list(map(int, input().split()))

  digits = {}

  for d in map(int, input().split()):
    if COSTS[d] not in digits or digits[COSTS[d]] < d:
      digits[COSTS[d]] = d

  digits = [(d, c) for c, d in digits.items()]
  base_digit, base_cost = min(digits, key=lambda x: x[1])

  for length in range(remain // base_cost, -1, -1):
    if gen(base_digit, base_cost, length, digits, remain):
      break


if __name__ == '__main__':
  main()



### FIXED CODE ###

#!/usr/bin/env python
# -*- coding: utf-8 -*-
import itertools

COSTS = (99, 2, 5, 5, 4, 5, 6, 3, 7, 6)


def gen(base_digit, base_cost, base_length, digits, remain):
  number = [base_digit] * base_length
  remain -= base_cost * base_length

  if remain == 0:
    print(''.join(str(d) for d in number), flush=True)
    return True

  digits = [(d, c - base_cost) for d, c in digits if d != base_digit and c - base_cost <= remain]

  if len(digits) == 0:
    return False

  max_repeat = min(remain // min(digits, key=lambda x: x[1])[1], len(number))
  numbers = []

  for repeat in range(1, max_repeat + 1):
    for idxs in itertools.product(range(len(digits)), repeat=repeat):
      if sum(digits[i][1] for i in idxs) != remain:
        continue

      replaces = [digits[i][0] for i in idxs]
      uppers = [d for d in replaces if d > base_digit]
      lowers = [d for d in replaces if d < base_digit]

      num = number[:]

      if len(uppers) > 0:
        num = uppers + num[len(uppers):]

      if len(lowers) > 0:
        num = num[:-len(lowers)] + lowers

      numbers.append(num)

  if len(numbers) == 0:
    return False

  number = max(numbers)

  print(''.join(str(d) for d in number), flush=True)

  return True


def main():
  remain, _ = list(map(int, input().split()))

  digits = {}

  for d in map(int, input().split()):
    if COSTS[d] not in digits or digits[COSTS[d]] < d:
      digits[COSTS[d]] = d

  digits = [(d, c) for c, d in digits.items()]
  base_digit, base_cost = min(digits, key=lambda x: x[1])

  for length in range(remain // base_cost, -1, -1):
    if gen(base_digit, base_cost, length, digits, remain):
      break


if __name__ == '__main__':
  main()