#include<stdio.h>

long long s[100002],a[100002],poz[100002],max,n,i,j,pozmax;
int main()
{       freopen("scmax.in","r",stdin);
	freopen("scmax.out","w",stdout);
	scanf("%lld",&n);
	for(i=1;i<=n;i++)scanf("%lld",&s[i]);
	a[n]=1;poz[n]=-1;max=1;pozmax=n;
	for(i=n-1;i>0;i--)
	{	a[i]=1;poz[i]=-1;
		for(j=i+1;j<=n;j++)
		if(s[i]<s[j]&&a[i]<a[j]+1)
		{	a[i]=a[j]+1;poz[i]=j;
			if(a[i]>max){max=a[i];pozmax=i;}
		}

	}
	printf("%lld\n",max);
	while(pozmax!=-1)
	{	printf("%lld ",s[pozmax]);
		pozmax=poz[pozmax];
	}
	return 0;
}