What is "Compilation error"?
It seems that there's nothing wrong with my program.

type ac=array[1..100]of longint;
var a,c:array[0..1000]of ac;b,d,e,f,g,h,i,j,k,l,m,n:longint;
function add(a,c:ac):ac;
var i,j:longint;
begin
 j:=0;
 for i:=100 downto 1 do begin
  add[i]:=a[i]+c[i]+j;
  j:=add[i] div 10;
  add[i]:=add[i] mod 10;
 end;
end;
function times(a,c:ac):ac;
var i,j,l:longint;
begin
 fillchar(times,sizeof(times),0);
 for i:=100 downto 1 do begin
  l:=0;
  for j:=100 downto 1 do
   if i+j-100>0 then begin
    times[i+j-100]:=times[i+j-100]+a[i]*c[j]+l;
    l:=times[i+j-100] div 10;
    times[i+j-100]:=times[i+j-100] mod 10;
   end;
 end;
end;
procedure out(a:ac);
var i,j:longint;
begin
 for i:=1to 100 do
  if a[i]<>0 then break;
 for j:=i to 100 do
  write(a[j]);
 writeln;
end;
begin
 read(m,n);
 if (n mod 2=1)or(m*2*9<n) then
  writelN('0')
 else begin
  fillchar(a,sizeof(a),0);
  a[0,100]:=1;
  for i:=1to n do begin
   c:=a;
   fillchar(a,sizeof(a),0);
   for j:=1to m do
    for l:=0to 9 do
     if j>=l then a[j]:=add(a[j],c[j-l]);
  end;
  out(times(a[m],a[m]));
 end;
end.

My compiler says
"Error: Not enough actual parameters"

>> add[i]:=a[i]+c[i]+j;
>> fillchar(times,sizeof(times),0);