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#include <fstream>
using namespace std;
ifstream cin("scmax.in");
ofstream cout("scmax.out");
int dp[100001];
int main()
{
int st,dr,mij,poz,n,i,k=0,nr;
cin>>n;
for(i=1;i<=n;i++)
{
cin>>nr;
st=1;
dr=k;
poz=0;
while(st<=dr)
{
mij=(st+dr)/2;
if(dp[mij]<nr)
{
poz=mij;
st=mij+1;
}
else
dr=mij-1;
}
dp[poz+1]=nr;
k=max(poz+1,k);
}
cout<<k<<'\n';
for(i=1;i<=k;i++)
cout<<dp[i]<<" ";
return 0;
}