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#include <bits/stdc++.h>
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
typedef long long ll;
int dp[100001],n,v[100001],maxim,maxi[100001];
int main()
{
ios_base::sync_with_stdio(false);
fin.tie(0);
fout.tie(0);
fin>>n;
for(int i=1;i<=n;i++)
fin>>v[i];
dp[n]=1;
maxi[1]=v[n];
for(int i=n-1;i>=1;i--)
{
dp[i]=1;
int st=1;
int dr=n;
int pozmax=0;
while(st<=dr)
{
int mij=(st+dr)/2;
if(maxi[mij]>v[i])
{
if(mij>pozmax)
pozmax=mij;
st=mij+1;
}
else
dr=mij-1;
}
dp[i]=pozmax+1;
if(maxi[dp[i]]<v[i])
maxi[dp[i]]=v[i];
if(maxim<dp[i])
maxim=dp[i];
}
fout<<maxim<<'\n';
int cr=0;
int pls=maxim;
for(int i=1;i<=n;i++)
if(dp[i]==pls)
{
if(v[i]>cr)
{
cr=v[i];
pls--;
fout<<cr<<" ";
}
}
return 0;
}