#include <stdio.h>
#include <bits/stdc++.h>
#include <atcoder/all>
using namespace atcoder;
using mint = modint1000000007;
using namespace std;
#define rep(i,n) for(int i=0;i<(n);i++)
#define Inf 1000000001

using P = pair<int,mint>;

P op(P a,P b){
	if(a.first==b.first){
		return make_pair(a.first,a.second+b.second);
	}
	if(a.first>b.first)return a;
	return b;
}

P e(){
	return make_pair(0,0);
}

int main(){
	
	int n;
	cin>>n;
	
	vector<int> p(n);
	rep(i,n){
		cin>>p[i];
		p[i]--;
	}
	
	segtree<P,op,e> s0(n),s1(n);
	
	rep(i,n){
		auto ret = s0.prod(0,p[i]);
		if(ret==e()){
			ret.first = 1;
			ret.second = 1;
		}
		else ret.first++;
		s0.set(p[i],ret);
	}
	
	for(int i=n-1;i>=0;i--){
		auto ret = s1.prod(p[i]+1,n);
		if(ret==e()){
			ret.first = 1;
			ret.second = 1;
		}
		else ret.first++;
		s1.set(p[i],ret);
	}
	
	vector<int> ans;
	rep(i,n){
		auto r0 = s0.get(p[i]);
		auto r1 = s1.get(p[i]);
		r0.first += r1.first - 1;
		r0.second *= r1.second;
		if(s0.all_prod()==r0)ans.push_back(p[i]);
	}
	
	cout<<ans.size()<<endl;
	rep(i,ans.size()){
		if(i!=0)cout<<' ';
		cout<<ans[i]+1;
	}
	cout<<endl;
		
	
	return 0;
}