What could be wrong with this code?

Program Easy;
 Const Max=10006;
 Var i,n,k:Longint;
     a:Array[1..Max] Of Longint;
     x,y,z:Longint;
     u,q:Real;
 Function ok(l:Longint):Boolean;
  Var i,s:Longint;
 Begin
  s:=0;
  For i:=1 To n Do
   s:=s+a[i] Div l;
  ok:=s>=k;
 End;
Begin
{ Assign(Input,'1184.in'); Reset(input);{}
 Read(n,k);
 y:=10000000;
 For i:=1 To n Do Begin
  Read(u);
  a[i]:=Round(u*100);
 End;
 x:=1;
 If Not ok(x) Then Begin
  Writeln('0.00');
  Halt;
 End;
 While y-x>1 Do Begin
  z:=(y+x) Div 2;
  If ok(z) Then
   x:=z
  Else
   y:=z;
 End;
 While Not ok(z) Do
  z:=z-1;
 While Ok(z+1) Do
  z:=z+1;
 q:=z;
 q:=q/100;
 Writeln(q:0:2);
End.