L = int(input())
N = int(input())
D = input()

# print(L)
# print(N)
# print(D)

blocks = D.split()
# for val in blocks :
#     val = int(val)
blocks.sort(key=int)

# print(blocks)

block_l = 0
block_c = 0

while L >= (block_l + int(blocks[block_c])):
    block_l = block_l + int(blocks[block_c])
#    print(block_l)
    block_c = block_c + 1
    
# print(L)
# print(N)
# print(D)

# print(L+N)
# print(data)
print(block_c)