#include<stdio.h>
int v[100001],L[100001];
int main(){
    int n,i,m,max,j;
    freopen("scmax.in","r",stdin);
    freopen("scmax.out","w",stdout);
    scanf("%d",&n);
    for(i=1;i<=n;i++)
        scanf("%d",&v[i]);
    m=0;
    L[n]=1;
    for(i=n-1;i>=1;i--){
        max=0;
        for(j=i+1;j<=n;j++)
            if(v[i]<v[j]&&max<L[j])
                max=L[j];
        L[i]=max+1;
        if(m<max+1)
            m=max+1;
    }
    printf("%d\n",m);
    for(i=1;i<=n&&m!=0;i++)
        if(L[i]==m){
            printf("%d ",v[i]);
            m--;
        }
    printf("\n");
    return 0;
}