#include <iostream>
#include <vector>
#include <algorithm>
#include <map>
#include <string>
#include <queue>
#include <stack>
#include <math.h>
#include <set>
#define ALL(obj) (obj).begin(),(obj).end()
#define RALL(obj) (obj).rbegin(),(obj).rend()
#define P pair<int, int>

#define MOD 1000000007
#define INF 1012345678
#define NINF (-2147483647-1)
#define LLINF 9223372036854775807
using ll = long long;
using namespace std;

int main() {
    int N;
    cin >> N;
    vector<int> A(N+1, INF);
    for (int i = 0; i < N; i++)
    {
        int a;
        cin >> a;
        int r = N, l = -1;
        while (r - l > 1) {
            int mid = (r + l) / 2;
            if (A[mid] >= a) r = mid;
            else l = mid;
        }
        A[r] = a;
    }
    int r = N, l = -1;
    while (r - l > 1) {
        int mid = (r + l) / 2;
        if (A[mid] >= INF) r = mid;
        else l = mid;
    }
    cout << N - r << endl;
    getchar(); getchar();
    return 0;
}