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#include<bits/stdc++.h>
using namespace std;
ifstream f("scmax.in");
ofstream g("scmax.out");
const int N = 100003;
int best[N],a[N], maxim,poz[N],p;
int n;
void read()
{
f>>n;
for(int i=1; i<=n; ++i)
f>>a[i];
}
void dinamic()
{
int i,st,dr,mi;
best[1]=1;
maxim=1;
for(i=2;i<=n; i++)
{
if(a[i]>a[best[maxim]])
{
poz[i]=best[maxim];
best[++maxim]=i;
continue;
}
st=0;dr=maxim;
while(dr-st>1)
{
mi=(st+dr)/2;
if(a[i]>a[best[mi]])
st=mi;
else
dr=mi;
}
best[dr]=i;
poz[i]=best[st];
}
}
void afisare(int p)
{
if(p==0)
g<<maxim<<'\n';
else
{
afisare(poz[p]);
g<<a[p]<<' ';
}
}
int main()
{
read();
dinamic();
afisare(best[maxim]);
return 0;
}