#include "bits/stdc++.h"
using namespace std;

#define int long long
#define PB push_back
#define PPB pop_back
typedef pair<int, int> pii;
typedef pair<double, double> pdd;

static const int INF = 1LL << 61;

int dp[100005], n, a[100005];

signed main() {
    ios::sync_with_stdio(false);
    cin.tie(0);

    cin >> n;
    for (int i = 0; i < n; ++i) cin >> a[i];

    fill(dp, dp + n, INF);
    for (int i = 0; i < n; ++i) {
        *lower_bound(dp, dp + n, a[i]) = a[i];
    }

    cout << n - (lower_bound(dp, dp + n, INF) - dp) << endl;


}