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

    printf("%d\n",r);
    for(i=poz;i<=n;i++)
        if(l[i]==r){
            printf("%d ",v[i]);
            r--;
        }
    return 0;
}