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#include <bits/stdc++.h>
#define NMAX 100001
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
struct sir{
int val, seqLen, root;
}V[NMAX];
int n, cntr;
void path(int ind) {
if(V[ind].root != -1){
path(V[ind].root);
fout << V[ind].val << ' ';
}
else fout << V[ind].val << ' ';
}
int main()
{
fin >> n;
for(int i = 1; i <= n; i++) {
fin >> V[i].val;
V[i].root = -1;
V[i].seqLen = 1;
}
for(int i = 2; i <= n; i++) {
for(int j = 1; j <= i; j++) {
if(V[i].val > V[j].val && V[j].seqLen + 1 > V[j].seqLen) {
V[i].seqLen = V[j].seqLen + 1;
V[i].root = j;
}
}
}
int ma = 0, ind;
for(int i = 1; i <= n; i++) {
if(ma < V[i].seqLen) {
ma = V[i].seqLen;
ind = i;
}
}
fout << ma << '\n';
path(ind);
return 0;
}