#include <fstream>
#include <iostream>
using namespace std;
ifstream f1("scmax.in");
ofstream f2("smax.out");

 int i,j,n,x[100005],DP[100005],sol,k,l,maxx;
void cit(){
f1>>n;
for(i=1;i<=n;i++){

    f1>>x[i];
}
}


void rez(){
for (i=n;i>=1;i--){
    for(j=i+1;j<=n;j++){
        if(x[i]<x[j]&&DP[j]>DP[i]){
            DP[i]=DP[j];
        }
    }
        DP[i]++;

}
sol=1;
for(i=1;i<=n;i++){ if (DP[i]>sol){l=i;};sol=max(sol,DP[i]); }
f2<<sol<<'\n';  k=1; maxx=x[l]; f2<<x[l]<<' ';
while(k<sol){l++; if(x[l]>maxx){f2<<x[l]<<' ';  k++; maxx=x[l];}}
}

int main()
{
    cit();
rez();
    return 0;
}