#include<bits/stdc++.h>
using namespace std;
//n=6
//v  1 3 2 8 5 6
//dp 1 2 2 3 3 4
int n;
vector<int> v;
int dp[100001];
int x;
int ans;
int main(){
	cin>>n;
	for(int i=0;i<=n-1;i++){
		cin>>x;
		v.push_back(x);
		dp[i]=1;
	    for(int j=i-1;j>=0;j--){
		    if(v[i]>v[j]) dp[i]=max(dp[i],dp[j]+1);
	    }
		ans=max(ans,dp[i]);	
	}
	cout<<ans<<endl;
    return 0;
}








/**************************************************************
	Problem: 1893
	User: zengdongxin
	Language: C++
	Result: Time Limit Exceed
****************************************************************/