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#include <bits/stdc++.h>
#define nMax 100005
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
int n, k, a[nMax], p[nMax], best[nMax], lp[nMax];
void output(int k)
{
if(k>0)
{
output(p[k]);
fout << a[k] << " ";
}
}
int src(int x)
{
int sol=0, l=1, r=k;
while(l<=r)
{
int mid=(l+r)>>1;
if(x>a[lp[mid]])
{
l=mid+1;
sol=max(sol, mid);
}
else
r=mid-1;
}
return sol;
}
int main()
{
fin >> n;
for(int i=1; i<=n; i++)
fin >> a[i];
lp[0]=0, lp[1]=1, best[1]=1;
k=1;
for(int i=2; i<=n; i++)
{
int pos=src(a[i]);
p[i]=lp[pos];
best[i]=pos+1;
lp[pos+1]=i;
k=max(k, best[i]);
}
int lst, Max=0;
for(int i=1; i<=n; i++)
if(best[i]>Max)
{
Max=best[i];
lst=i;
}
fout << Max << "\n";
output(lst);
return 0;
}