Program zad;
uses crt;
var n,i:byte;
s:longint;
Begin
write('vvedite 0 s:=0;
   for i:=1 to n do
      if i<10 then s:=s+i*10+i
      else if i=100 then s:=s+100100 else
      s:=s+i*100+i;
   writeln(s);
readln;
End.