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#include <fstream>
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
int dp[100005],previous[100005],v[100005];
void reconst(int poz)
{
if(poz==0)
{
return;
}
reconst(previous[poz]);
fout<<v[poz]<<" ";
}
int main()
{
int n,i,j,maxim=0,pozmax;
fin>>n;
for(i=1;i<=n;i++)
{
fin>>v[i];
}
dp[1]=1;
previous[1]=0;
for(i=2;i<=n;i++)
{
dp[i]=1;
for(j=1;j<i;j++)
{
if(v[j]<v[i])
{
if(dp[i]<dp[j]+1)
{
dp[i]=dp[j]+1;
previous[i]=j;
}
}
}
}
pozmax=1;
for(i=2;i<=n;i++)
{
if(dp[i]>dp[pozmax])
{
pozmax=i;
}
}
fout<<dp[pozmax]<<'\n';
reconst(pozmax);
return 0;
}