#include <fstream>
using namespace std;
ifstream f("scmax.in");
ofstream g("scmax.out");
int v[100001],n,i, w[100001],m;
int completarew(int x){
    int maxw=-1;
    for(int j=x;j<=n;j++)
           if(v[x]<v[j]&&w[j]>maxw)maxw=w[j];
    if(maxw+1>m)m=maxw+1;
    return maxw+1;
}

void afisare(){
    int j=1;
    while(m>=0){
        while(w[j]!=m)j++;
        g<<v[j]<<" ";
        m--;
    }
}

int main()
{f>>n;
for(i=1;i<=n;i++) f>>v[i];

for(i=n;i>=1;i--)
    w[i]=completarew(i);
    g<<m+1<<"\n";
afisare();


    return 0;
}