#include <bits/stdc++.h>
using namespace std;
int poz[100001],l[100001],a[100001];
int n,Max,pozt;
int main()
{
    freopen("scmax.in","r",stdin);
    freopen("scmax.out","w",stdout);
    scanf("%d",&n);
    for(int i=1;i<=n;i++){
        scanf("%d",&a[i]);
        l[i]=1;
        poz[i]=-1;
    }

    for(int i=n-1;i>0;i--)
        for(int j=i+1;j<=n;j++){
            if(a[i]<a[j])
                if(l[i]<l[j]+1){
                    l[i]=l[j]+1; poz[i]=j;
                }

    if(l[i]>Max){
        Max=l[i];
        pozt=i;

    }}

    printf("%d\n",Max);

    int i=pozt;
    while(i!=-1)
    {
        printf("%d ",i);
        i=poz[i];
    }
    return 0;
}