#include <fstream>
#include <vector>

using namespace std;

const int Nmax = 100005;

int n, v[Nmax], dp[Nmax];
// dp[i] = secv str cresc de lungime maxima care se termina in a[i]


int main(){
    ifstream fin("scmax.in");
    ofstream fout("scmax.out");
    fin >>n;
    for(int i = 1; i <= n; i++){
        fin >> v[i];
    }
    int sol = 1;
    dp[1] = 1;
    for(int i = 2; i <= n; i++){
        int maxi = 0;
        for(int j = 1; j < i; j++){
            if(v[j] < v[i]){
                maxi = max(maxi, dp[j]);
            }
        }
        dp[i] = maxi+1;
        sol = max(sol, dp[i]);
    }

    fout << sol;

    return 0;
}