# high = 1
# l = width of big block
# wi = width of each block
# n = count of each block

l = gets.to_i
n = gets.to_i
wi_array = gets.split.map!{|x| x.to_i}
result = 0

# loop
for wi in wi_array.sort
    l = l - wi
    
    if l >= 0 then
        result += 1
    else
        break
    end
end

print result

exit