#include<fstream>


using namespace std;

int main()
{int sir[25],max[25];
int n,i,maxi,subsir=0,d,k;
ifstream f1("subsir2.in");
ofstream f2("subsir2.out");
f1>>n;
for(i=1;i<=n;i++)
	{f1>>sir[i];
	max[i]=0;
	}
	max[1]=1;
for(i=2;i<=n;i++)
{maxi=0;
	for(d=1;d<i;d++)
		{if((sir[i]>sir[d])&&(max[d]>maxi)) maxi=max[d];
		
		}
		maxi++;
		max[i]=maxi;
if(subsir<maxi) subsir=maxi;
}



f2<<subsir<<endl;
k=0;





for(i=n;i>=1;i--)
{if(max[i]==subsir-k)
{f2<<i<<" ";
	k++;
}
}


















return 0;
}