#include<fstream>
std::ifstream f("scmax.in");std::ofstream g("scmax.out");
int n,r,i,s,d,m,v[1<<17],k[1<<17],a[1<<17];
void p(){
if(r){
int n;
while(a[n=--i]!=r);
r--;
p();
g<<v[n]<<" ";}}
main(){
for(f>>n,i=1;i<=n;d=i++){f>>v[i],s=0,k[i]=2e9;
while(s<=d)if(k[m=(s+d)/2]<v[i])s=m+1;else d=m-1;
if(k[d]<v[i])k[a[i]=s]=v[i],r=s>r?s:r;
}
g<<r<<" ",p();}