#include <bits/stdc++.h>
using namespace std;

typedef long long ll;

int A[1000],L[1000],P[1000],n,x,mx;

int main(){
	ifstream cin("scmax.in");
	ofstream cout("scmax.out");
	cin>>n;
	for(int i=0;i<n;i++){
		cin>>A[i];
		L[i]=1;
		P[i]=-1;
	}
	for(int i=1;i<n;i++){
		for(int j=0;j<i;j++){
			if(A[i]>A[j] && L[i]<L[j]+1){
				L[i]=L[j]+1;
				P[i]=j;
				if(L[i]>mx){
					mx=L[i];
					x=i;
				}
			}
		}
	}
	int i=x;
	cout<<mx<<"\n";
	while(i!=-1){
		cout<<A[i]<<" ";
		i=P[i];
	}
	return 0;
}