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