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#include <bits/stdc++.h>
#define DMAX 100005
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
int Sol[DMAX];
int best[DMAX];
int V[DMAX],poz[DMAX];
int n;
void citire();
void pd();
int main()
{citire();
pd();
return 0;
}
void citire()
{int i;
fin>>n;
for(i=1;i<=n;i++)
fin>>V[i];
}
void pd()
{int i,pozi,lgmax=1;
poz[1]=1;
best[1]=V[1];
for(i=2;i<=n;i++)
if(V[i]>best[lgmax])
{best[++lgmax]=V[i];
poz[i]=lgmax;
}
else
{pozi=lower_bound(best+1,best+1+lgmax,V[i])-best;
best[pozi]=V[i];
poz[i]=pozi;
}
fout<<lgmax<<'\n';
int lg=lgmax;
for(i=n;i>=1;i--)
if(poz[i]==lgmax)
{Sol[lgmax]=V[i];
lgmax--;
}
for(i=1;i<=lg;i++)
fout<<Sol[i]<<' ';
fout<<'\n';
}