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#include <iostream>
#include <fstream>
#include <vector>
using namespace std;
ifstream f("scmax.in");
ofstream g("scmax.out");
long long n,i,j;
void SCMAX()
{
f>>n;
pair <int, int> v[n+1];
vector<int> dp(n+1);
f>>v[1].first;
dp[1]=1;
v[1].second=0;
for(i=2;i<=n;i++)
{
f>>v[i].first;
dp[i]=1;
v[i].second=0;
for(j=1;j<i;j++)
{
if(v[j].first<v[i].first)
{
if(dp[j]+1>dp[i])
{
dp[i]=dp[j]+1;
v[i].second=j;
}
}
}
}
long long sol=dp[1],pos=1;
for(i=2;i<=n;i++)
{
if(dp[i]>sol)
{
sol=dp[i];
pos=i;
}
}
g<<sol<<'\n';
for(i=sol;i>=1;i--)
{
g<<v[pos].first<<' ';
pos=v[pos].second;
}
}
int main()
{
SCMAX();
return 0;
}