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#include <bits/stdc++.h>
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
int n,a[100001];
int best[100001];
int pre[100001],v[100001];
int main()
{
fin>>n;
int x=0;
for(int i=1; i<=n; i++)
{
fin>>a[i];
int in=1,sf=x;
int r=0;
while(in<=sf)
{
int mij=(in+sf)/2;
if(a[best[mij]]<a[i])
{
in=mij+1;
r = mij;
}
else
{
sf=mij-1;
}
}
best[r+1]=i;
pre[i]=best[r];
if(r==x) x++;
}
fout<<x<<"\n";
int cop=x;
int poz = best[x];
while(x > 0)
{
v[x] = a[poz];
x--;
poz = pre[poz];
}
for(int i=1; i<=cop; i++)
{
fout<<v[i]<<" ";
}
return 0;
}