const
n=10;
var
i:integer;
a:array[1..n] of integer;
begin
for i:=1 to n do
begin
a[i]:=random(20);
write(' ',a[i]:3);
end;
writeln();
writeln('-------');
for i:=1 to n do begin
if i mod 2 = 0 then a[i]:=0
else a[i]:=-1;
end;
writeln('-------');
for i:=1 to n do
write(' ',a[i]:3);
writeln();
end.