#include <bits/stdc++.h>
using namespace std;
#define int              long long int
#define double           long double
#define print(a)         for(auto x : a) cout << x << " "; cout << endl


const int M = 1000000007;
const int N = 3e5+9;
const int INF = 2e9+1;
const int LINF = 2000000000000000001;

inline int power(int a, int b, int mod=M) {
    int x = 1;
    a %= mod;
    while (b) {
        if (b & 1) x = (x * a) % mod; 
        a = (a * a) % mod;
        b >>= 1;
    }
    return x;
}


//_ ***************************** START Below *******************************




vector<int> a;

int consistency(int n){
	
    vector<int> dp(n, 0);
    dp[0] = 1;  
    
    int gMaxi = 1;  
    
    for(int i=1; i<n; i++){
        
        //* 1st Option
        dp[i] = 1;
        
        //* Other Options
        for(int j=i-1; j>=0; j--){
            if(a[i] > a[j]) dp[i] = max(dp[i], dp[j]+1);
        }
        gMaxi = max(gMaxi, dp[i]);
    }   
    
    return gMaxi;
}















int practice(int n){


    return 0;
}





void solve() {
    
    int n;
    cin>> n;
    
    a.resize(n);
    for(int i=0; i<n; i++) cin >> a[i];
    
    cout << consistency(n) << endl;


}





int32_t main() {
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);

    int t = 1;
    // cin >> t;
    while (t--) {
        solve();
    }

    return 0;
}