#include <bits/stdc++.h>
using namespace std;
int n;
int A[100000 + 1], L[100000];
int lis() {
  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 < length; j++) {
        if (L[j] > A[i]) {
          L[j] = A[i];
          break;
        }
      }
    }
  }
  return length;
}
int main() {
  cin >> n;
  for (int i = 0; i < n; i++) {
    cin >> A[i];
  }
  cout << lis() << endl;
  return 0;
}
