#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  cin >> n;
  int A[n], L[n];
  for (int i = 0; i < n; i++) cin >> A[i];
  L[0] = A[0];
  int length = 1;
  for (int i = 1; i < n; i++) {
    if (L[length - 1] < A[i])
      L[length++] = A[i];
    else {
      for (int j = 0; j < i; j++) {
        if (L[j] > A[i]) {
          L[j] = A[i];
          break;
        }
      }
    }
  }
  cout << length << endl;
}
