#include<fstream.h>
ifstream fin("scmax.in");
ofstream fout("scmax.out");
long v[100005],p[100005],q[100005],n,l,i,t,g=0;
const long s=2000000001;
long cautare(long k,long x, long y)
	{long m=x+(y-x)/2;
	 if (x==y)
		{if (y>l) q[++l+1]=s;
		 q[x]=k;
		 return x;}
		else if (k<=q[m])
			return cautare(k,x,m);
		   else return cautare(k,m+1,y);}
int main()
	{fin>>n;
	 for (i=1;i<=n;i++)
		fin>>v[i];
	 q[1]=s;l=0;
	 for (i=1;i<=n;i++)
		p[i]=cautare(v[i],1,l+1);
	 fout<<l<<'\n';
	 t=l;
	 for (i=l;i>=1;i--)
		if (p[i]==t)
			{g++;
			 q[g]=v[t];
			 t--;}
	 for (i=1;i<=l;i++)
         	fout<<q[i]<<' ';
fout.close();
return 0;}