Var
a, c : array of integer;
n, i : integer;
begin
read(n);
SetLength(a, n + 1);
SetLength(c, n + 1);
for i:=1 to n do
read(c[i]);
for i:=1 to n do
if (i mod 2 = 0) then
a[i] := c[i] div 2
else
a[i] := 2 * c[i];
for i:=1 to n do
write(a[i], ' ');
end.