input = input()
split_input = input.split()

l = split_input[0]
num = split_input[1]
blockList = sorted(split_input[2].split(' '))

blockCount = 0
blockLen = 0
for i in blockList:
    if (blockLen + i <= l):
        blockLen += i
        blockCount += 1
    else:
        break
print(blockCount)