program t
implicit none
integer::L
integer::N
integer,allocatable,dimension(:)::W
integer::ANS,SUMW=0
read*,L
read*,N
allocate(W(N))
read*,W
call heapsort(N,W)
do ANS=1,N
  if(SUMW+W(ANS)>L)then
    print"(I0)",ANS-1
    stop
  endif
  SUMW=SUMW+W(ANS)
end do
print"(I0)",N
contains
subroutine heapsort(n,array)
  implicit none
!ここの入力は状況に応じて変更すること
  integer,intent(in) :: n
  integer,intent(inout) :: array(1:n)
  integer::i,k,j,l
  integer:: t

  l=n/2+1
  k=n
  do while(k /= 1)
     if(l > 1)then
        l=l-1
        t=array(L)
     else
        t=array(k)
        array(k)=array(1)
        k=k-1
        if(k == 1) then
           array(1)=t
           exit
        endif
     endif
     i=l
     j=l+l
     do while(j<=k)
        if(j < k)then
           if(array(j) < array(j+1))j=j+1
        endif
        if (t < array(j))then
           array(i)=array(j)
           i=j
           j=j+j
        else
           j=k+1
        endif
     enddo
     array(i)=t
  enddo
  return
end subroutine heapsort

end program t