Could anybody tell my what the test data#8 is,
or tell me where my program wrong:
var
  a,b,c:array [1..20000] of 0..9;
  n,k:longint;
  i,j:int64;

procedure mul;
  var i,j,r,c:byte;
  begin
    c:=0;
    inc(j);
    while a[j]=0 do dec(j);
    i:=0;
    repeat
      inc(i);
      r:=a[i]*(k-1)+c;
      a[i]:=r mod 10;
      c:=r div 10;
    until i=(j+1);
  end;

procedure add;
  var i,j,r,c:byte;
  begin
    c:=0;
    inc(j);
    while a[j]=0 do dec(j);
    i:=0;
    repeat
      inc(i);
      r:=a[i]+b[i]+c;
      a[i]:=r mod 10;
      c:=r div 10;
    until i=(j+1);
  end;

begin
  read(n,k);
  fillchar(a,sizeof(a),0);
  fillchar(b,sizeof(b),0);
  fillchar(c,sizeof(c),0);
  a[1]:=k-1;
  j:=1793;
  i:=1;
  repeat
    inc(i);
    c:=a;
    add;
    mul;
    b:=c;
  until i=n;
  add;
  inc(j);
  while a[j]=0 do dec(j);
  inc(j);
  repeat
    dec(j);
    write(a[j]);
  until j=1;
  writeln;
end.
(like this one:
var
  a,b,c:extended;
  n,k,i:integer;
begin
  readln(n,k);
  a:=k-1;
  for i:=2 to n do begin
  c:=a;
  a:=(a+b)*(k-1);
  b:=c;
  end;
  a:=a+b;
  writeln(a);
end.)

[quote]
procedure mul;
var i,j,r,c:byte;
begin
c:=0;
inc(j);
while a[j]=0 do dec(j);
i:=0;
repeat
inc(i);
r:=a[i]*(k-1)+c;
a[i]:=r mod 10;
c:=r div 10;
until i=(j+1);
end;
[/quote]
r and others must not to be byte
"r:=a[i]*(k-1)+c;"
a[i]*(k-1)+c can be >255
use longint maybe

Edited by author 11.09.2007 23:33