#include <stdio.h>

using namespace std;
int n,v[100000],maxim,max1,k,i,j,c[100000];
void afisare(int x,int a){
    if(a>=0){
        int z=x;
        while(c[z]!=a)z--;
        afisare(z,a-1);
        printf("%d ",v[x]);}
}

int main()
{
    freopen("scmax.in","r",stdin);
    freopen("scmax.out","w",stdout);
    scanf("%d",&n);
    for(i=1;i<=n;i++){
        scanf("%d",&v[i]);
        maxim=0;
        for(j=i;j>=1;j--){
            if(c[j]>maxim&&v[j]<v[i])maxim=c[j];
        }
        c[i]=maxim+1;
        if(max1<maxim){
            k=i;
            max1=maxim;
        }
    }
    printf("%d\n",c[k]);
    afisare(k,max1);
}