#include<cstdio>

using namespace std;

const int nmax=5005;

int v[nmax],d[nmax],t[nmax];
bool used[nmax];

int main()
{
    freopen("subsir2.in","r",stdin);
    freopen("subsir2.out","w",stdout);
    int n,i,j;
    scanf("%d",&n);
    for(i=1;i<=n;++i)
        scanf("%d",&v[i]);
    d[n]=1;
    t[n]=n;
    int minim,maxim;
    d[n]=1;
    t[n]=n;
    v[0]=1000005;
    for(i=n-1;i;--i)
    {
        maxim=0;
        minim=1000005;
        for(j=i+1;j<=n;++j)
            if(v[i]<=v[j])
            {
                used[j]=1;
                if(v[j]<minim)
                {
                    if(maxim==0||d[maxim]>d[j])
                        maxim=j;
                    else if(d[j]==d[maxim]&&v[j]<v[maxim])
                        maxim=j;
                    minim=v[j];
                }
            }
        if(maxim==0)
            d[i]=1,t[i]=i;
        else
            d[i]=d[maxim]+1,t[i]=maxim;
    }
    maxim=0;
    for(i=1;i<=n;++i)
        if(!used[i])
        {
            if(maxim==0||d[i]<d[maxim])
                maxim=i;
            else if(d[i]==d[maxim]&&v[i]<v[maxim]);
                maxim=i;
        }
    printf("%d\n",d[maxim]);
    while(t[maxim]!=maxim)
    {
        printf("%d ",maxim);
        maxim=t[maxim];
    }
    if(d[maxim])
        printf("%d",maxim);
}