const a=10;
var xxx,yy,z;
begin
  xxx:=a;
  yy:=10;
  z:=xxx;
  z:=xxx*yy+z;
  z:=0;
  while yy>0 do begin
    z:=z+yy;
    yy:=yy-1;
  end;
  write(z);
end.