Const
    n = 10;

var
    a: array[1..n] of integer;
    i, s: integer;

begin
    s := 0;
    for i := 1 to n do
    begin
        a[i] := random(20) - 10;
        if (a[i] lt; 0) then s := s + a[i];
    end;
    writeln(s);
end.