import core.bitop, std.algorithm, std.ascii, std.bigint, std.conv, std.math,
    std.functional, std.numeric, std.range, std.stdio, std.string, std.random,
    std.typecons, std.container;

// dfmt off
T lread(T = long)(){return readln.chomp.to!T();}
T[] aryread(T = long)(){return readln.split.to!(T[])();}
void scan(TList...)(ref TList Args){auto line = readln.split();
foreach (i, T; TList){T val = line[i].to!(T);Args[i] = val;}}
alias sread = () => readln.chomp();enum MOD = 10 ^^ 9 + 7;
// dfmt on

void main()
{
    long N = lread();
    auto A = aryread();
    long[] ans;
    auto B = new long[](N);
    foreach_reverse (i; 0 .. N)
    {
        long tmp;
        long j = 1;
        while (j * (i + 1) - 1 < N)
        {
            tmp = tmp ^ B[j * (i + 1) - 1];
            j++;
        }
        if (tmp != A[i])
        {
            B[i] = 1;
            ans ~= i + 1;
        }
    }
    writeln(ans.length);
    if (ans.empty)
        return;
    foreach (i; 0 .. ans.length - 1)
        write(ans[i], " ");
    writeln(ans[$ - 1]);
}
