#include <cstdlib>
#include <algorithm>
#define nmax 100002
using namespace std;

int n,a[nmax],x[nmax],res[nmax],d[nmax],arb[nmax],miau[nmax];
int i,aux,H;

void update(int x, int y);
int query(int x);

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]),
    res[i] = x[i] = a[i];
 sort(x+1,x+n+1);
 
 for(i=2,aux=1;i<=n;++i)
    if(x[i] != x[aux])
        x[++aux] = x[i];
 
 for(i=1;i<=n;++i)
    a[i] = lower_bound(x+1,x+aux+1, a[i])-x;
 
 for(i=1;i<=n;++i){
    miau[i] = query(a[i] - 1);
    d[i] = d[miau[i]] + 1;
    update(a[i],i);
    } 
 
 for(i=1;i<=n;++i)
    if(d[H]<d[i])
        H = i;
 
 printf("%d\n",d[aux]);
 for(aux = 0, i = H; i; i = miau[i])
    x[++aux] = res[i];
 
 for(i=aux; i; --i)
    printf("%d ",x[i]);
 
 return 0;
}

void update(int x, int y){
for(;x<=n; x+= x^(x-1)&x)
    if(d[arb[x]] < d[y])
        arb[x] = y;
}

int query(int x){
for(aux=0;x;x-=x^(x-1)&x)
    if(d[aux] < d[arb[x]])
        aux = arb[x];
return aux;
}