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#include<fstream>
using namespace std;
ifstream fin("subsir2.in");
ofstream fout("subsir2.out");
int poz[100001];
int l[5005];
int v[5005];
int prov[5005];
int n;
int main(){
fin>>n;
for(int i=1;i<=n;i++)
fin>>v[i];
poz[n]=-1;
l[n]=1;
int j;
for(int i=n-1;i>0;i--)
for(poz[i]=-1,l[i]=1,j=i+1;j<=n;j++)
if(v[i]<=v[j]){
prov[j]=1;
if(l[i]<1+l[j]){
l[i]=l[j]+1;
poz[i]=j;
}
else if(v[j]<v[poz[i]]&&l[i]==1+l[j]){
poz[i]=j;
}
}
int maxi=1,maxl=5002;
for(int i=1;i<=n;i++)
if(maxl>l[i]&&prov[i]==0){maxl=l[i];maxi=i;}
fout<<maxl<<'\n';
do{
fout<<maxi<<" ";
maxi=poz[maxi];
}while(maxi!=-1);
fout<<'\n';
fin.close();
fout.close();
}