#include<bits/stdc++.h>
using namespace std;
const int N=2e5+1;
int n,a[N],ans[N],cnt;
int getSum(int x){
	int pos=x*2,sum=0;
	while(pos<=n) sum+=a[pos],pos+=x;
	return sum;
}
int main(){
	scanf("%d",&n);
	for(int i=1;i<=n;++i) scanf("%d",&a[i]);
	for(int i=n;i;--i) ans[i]=(getSum(i)&1)!=a[i],cnt+=ans[i];
	printf("%d\n",cnt);
	for(int i=1;i<=n;++i) if(ans[i]) printf("%d ",i);
	return 0;
}