Program raznica;
Var a: array [1..100] of integer;
i, n: integer;
pa, pb, delta: longint;
Begin
Write('vvedite kol-vo chisel: '); Readln(n);
For i := 1 to n do begin
write('vvedite ', i, ' chislo: '); Readln(a[i]);
End;
pa := 1; {chet}
pb := 1; {nechet}
for i := 1 to n do begin
if (i mod 2 = 0) then pa := pa * a[i] else pb := pb * a[i];
end;
delta := pa - pb;
writeln('raznica proizvedenij: ', delta);
End.