#include <bits/stdc++.h>
 
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
int a[100010],n,dp[100010],poz[100010];
int main()
{
    fin>>n;
    for(int i=1;i<=n;i++) fin>>a[i],dp[i]=1;
    int max1=1,p=1;
    for (int i=n-1;i>=1;i--){
        for(int j=i+1;j<=n;j++){
            if (a[i]<a[j]&&dp[i]<dp[j]+1) dp[i]=dp[j]+1,poz[i]=j;
        }
        if (dp[i]>max1) max1=dp[i],p=i;
    }
    fout <<max1<<endl;
    for(int i=p;i!=0;i=poz[i]) fout<<a[i]<<" ";
    return 0;
}