.model small
.stack 100h
equ db num 10
.data
Old db 3, 10, 15,5 ,7 ,18, 9 , 20 ,5 ,1
New db num dup 0
.code
begin:
    move ax, @data
    move ds, ax
    lea bx, Old
    lea di, New

    mov ax, 0
L1:
    mov cx, 0
    cmp al, num
    ja sof
    mov ah, al
    inc ah
    push bx
    add bx, ah
L2:
    cmp ah, num
    jg sofL2

    mov dl, [bx]
    mov dh, [di]

    cmp dh, dl
    jl dont_count
    inc cx
dont_count:
    inc bx
    inc ah
    jmp L2
sofL2:
    pop bx
    mov [di], cl
    inc di
    jmp L1
sof:
    mov ah, 4ch
    int 21h
end begin