l=gets.to_i #length of the box
n=gets.to_i #number of blocks
w=gets.split().map(&:to_i).sort! #array of width of blocks

#puts l,n,w

if w.inject(:+)<l
puts n
return
end

if w[0]>l
puts 0
return
end

#if w[0]==l
#puts 1
#return
#end

sum=0
count=0
i=0
while sum + w[i] <= l
        sum += w[i]
        count+=1
        i+=1
end

puts count