var
a: array [1..3] of shortint;
i: byte;
begin
for i := 1 to 3 do
begin
a[i] := random(-1024, -1);
writeln(String.Format('a[{0}] => {1}', i, a[i]));
end;
writeln();
a[1] := 0;
for i := 1 to 3 do writeln(String.Format('a[{0}] => {1}', i, a[i]));
end.