#include<bits/stdc++.h>
#define int long long
#define gc getchar
#define pc putchar
#define rg register
#define LB lower_bound
#define UB upper_bound
#define PII pair<int, int>
#define PDI pair<double, int>
#define fi first
#define se second
#define IOS ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
using db=double;using ll=long long;
using ull=unsigned long long;
using namespace std;
const ll INF=1e18;
const int inf=0x3f3f3f3f;
namespace IO{
	inline ll read(){
		ll x=0,f=1;
		char ch=gc();
		while(!isdigit(ch)){
			if(ch=='-') f=-f;
			ch=gc();
		}
		while(isdigit(ch)) x=(x<<1)+(x<<3)+ch-'0',ch=gc();
		return x*f;
	}
	inline void write(ll x){
		if(x<0) pc('-'),x=-x;
		if(x>9) write(x/10);
		pc(x%10+'0');
	}
}using namespace IO;
const int N=2e5+10,U=1ll<<60;
int n,l[N],f[N],g[N];
vector<int> ans;
signed main(){
//	freopen("string.in","r",stdin);
//	freopen("string.out","w",stdout);
	n=read();
	for(rg int i=1;i<=n;i++) l[i]=read();
	f[0]=0;
	for(rg int i=1;i<=n;i++){
		int w=1ll<<(60-l[i]);
		f[i]=w*((f[i-1]+w-1)/w+1);
	}
	g[n+1]=U;
	for(rg int i=n;i>=1;i--){
		int w=1ll<<(60-l[i]);
		g[i]=w*(g[i+1]/w-1);
	}
	for(rg int i=1;i<=n;i++) if(f[i-1]<=g[i+1]) ans.push_back(i);
	write(ans.size()),pc(' ');
	for(int pos:ans) write(pos),pc(' ');
	return 0;
}