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