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#include <iostream>
#include<fstream>
using namespace std;
ofstream out("scmax.out");
ifstream in("scmax.in");
int n,vec[100000];
int d[100000];
int poz[100000];
void read()
{
in>>n;
for(int i=0; i<n; i++)
{
in>>vec[i];
}
}
void dpp()
{
d[n-1]=1;
int maxx=-1;
int index=0;
for(int i=n-2; i>=0; i--)
{
d[i]=1;
poz[i]=-1;
for(int k=i+1; k<n; k++)
{
if(vec[i]<vec[k])
{
if(d[k]+1>d[i])
{
d[i]=d[k]+1;
poz[i]=k;
}
}
}
if(d[i]>maxx)
{
maxx=d[i];
index=i;
}
}
out<<maxx<<endl;
int p=index;
do{
out<<vec[p]<<" ";
p=poz[p];
}
while(p>0);
}
int main()
{
read();
dpp();
return 0;
}