#include <stdio.h>
#define NMAX 5005
#define INF 2000000000
int n,A[NMAX],B[NMAX],rez;
void read()
{
	scanf("%d",&n);
	int i;
	for (i=1; i<=n; i++)
		scanf("%d",&A[i]);
}
inline int min(int a,int b)
{
	return a<b ? a : b;
}
void solve()
{
	int i,j,m;
	for (i=n; i>=1; i--)
	{
		m=INF;
		B[i]=INF;
		for (j=i+1; j<=n; j++)
			if (A[j]>A[i] && A[j]<m)
				m=A[j];
		for (j=i+1; j<=n; j++)
			if (A[j]==m)
				B[i]=min(B[i],B[j]);
		if (B[i]==INF)
			B[i]=1;
		else
			B[i]++;
	}
}
void show()
{
	int i;
	for (i=1; i<=n; i++)
		if (B[i]>rez)
			rez=B[i];
	printf("%d\n",rez);
	for (i=1; i<=rez; i++)
		printf("%d ",A[i]);
	printf("\n");
}
int main()
{
	freopen("subsir2.in","r",stdin);
	freopen("subsir2.out","w",stdout);
	read();
	solve();
	show();
	return 0;
}