program noname;
var
x, y: real;
begin
x := -3;
While (x <= 3) do
Begin
if (x <> 0) then
Begin
y := y + x - 1;
Writeln(x:4:1, ' ', y:4:1);
End;
x := x + 0.1;
End;
Readln;
end.
program noname;
var
x, y: real;
begin
x := -3;
While (x <= 3) do
Begin
if (x <> 0) then
Begin
y := y + x - 1;
Writeln(x:4:1, ' ', y:4:1);
End;
x := x + 0.1;
End;
Readln;
end.