C++
#include<bits/stdc++.h>
using namespace std;
//#define INF 2147483647
#define INFL 9223372036854775807
#define pii pair<int,int>
#define F first
#define S second
#define mp make_pair
#define pb push_back
#define ll long long
#define ull unsigned long long
#define M 1000000007
#define FASTIO ios_base::sync_with_stdio(false);cin.tie(NULL); cout.tie(NULL);
#define take(x) scanf("%d",&x)
#define DE(x) printf("\ndebug %d\n",x);
#define vout(x) for(int i=0;i<x.size();i++) printf("%d ",x[i]);
#define pie acos(-1)
#define MOD 998244353
int main() {
int n;
cin >> n;
vector<int> dp;
for (int i = 0; i < n; i++) {
int x;
cin >> x;
auto it = lower_bound(dp.begin(), dp.end(), x);
if (it == dp.end()) {
dp.push_back(x);
} else {
*it = x;
}
}
cout << dp.size() << endl;
}
1 2 3 4 5 6 7 8 9 10
0 0 0 4 0 6