#include<bits/stdc++.h>
using namespace std;
int n,x,dp[1000001],ans;
vector<int> v;
int main(){
	cin>>n;
	for(int i=1;i<=n;i++){
		cin>>x;
		v.push_back(x);
		dp[i]=1;
		for(int j=i-1;j>=1;j--){
			if(v[i]>v[j]) dp[i]=max(dp[1],dp[j]+1);
		}
		ans=max(ans,dp[i]);
	}
	cout<<ans;
    return 0;
}


/**************************************************************
	Problem: 1794
	User: zhuangsongyu
	Language: C++
	Result: Wrong Answer
****************************************************************/