//TC

#include <algorithm>
#include <iostream>
#include <cstdlib>
#include <cassert>
#include <cstring>
#include <cstdio>
#include <vector>
#include <queue>
#include <stack>
#include <cmath>
#include <list>
#include <set>
#include <map>

#define forn(a,b,c) for(int (a)=(b);(a)<=(c);(a)++)
#define forr(a,b,c) for(int (a)=(b);(a)>=(c);(a)--)
#define foreach(a,b) for( typeof( (b).begin() ) a=(b).begin(); (a)!=(b).end() ; (a)++ )
#define foreachr(a,b) for( typeof( (b).rbegin() ) a=(b).rbegin(); (a)!=(b).rend() ; (a)++ )
#define dg(x)  cerr <<#x<<':'<<x<<" "
#define dbg(x)  cerr <<#x<<':'<<x<<endl
#define SET(A,b) memset(A,b,sizeof (A) )
#define SIZE(A) ((int)(A).size())
#define ALL(A) (A).begin(),(A).end()
#define fi first
#define se second
#define pb push_back
#define mp make_pair
#define num(a) (1LL<<(a))
using namespace std;

typedef double dbl;
typedef long long Lint;
typedef pair<int,int> ii;
typedef pair<Lint,Lint> Lii;

const int MAXN = 5010;

int ar[MAXN];
int dn[MAXN];
int go[MAXN];

const int inf = 1e8;

int main(){
	
	freopen("subsir2.in","r",stdin);
	freopen("subsir2.out","w",stdout);
	
	int n;
	
	scanf("%d",&n);
	
	forn(i,1,n)
		scanf(" %d",ar+i);
	
	ar[n+1]=inf;
	ar[0]=-inf;
	
	int t;
	
	forr(i,n,0)
	{
		//~ dbg(i);
		t=inf+1;
		forn(j,i+1,n+1)
		{
			if( ar[j]>ar[i] && t>ar[j] && ( dn[i]<dn[j]+1 || (dn[i]==dn[j]+1 && ar[go[i]]>ar[j] ) ))
			{
				//~ printf("%d -> %d\n",i,j);
				dn[i]=dn[j]+1,go[i]=j;
			}
			if(ar[j]>=ar[i])
				t=min(t,ar[j]);
		}
		//~ printf("%d %d\n",dn[i],go[i]);
	}
	
	cout << dn[0] -1 << endl;
	
	int x=0;
	while(go[x]!=n+1)
	{
		printf("%d ",go[x]);
		x=go[x];
	}
	puts("");
		
	
	return 0;
	
}