#include<bits/stdc++.h>
#define ll long long
#define sz size
#define pb push_back
#define er erase
#define in insert
#define fr first
#define sc second
#define mp make_pair
#define pi pair
#define _ ios_base::sync_with_stdio(false);cin.tie(0);cerr.tie(0);cout.tie(0);
#define rc(s) return cout<<s,0
using namespace std;

int n,x;
vector<int>ans;

int binsearch(int l,int r,int y){
    int mid;
     while(l<=r){
        mid=l+(r-l)/2;
        if(ans[mid]<y) l=mid+1;
        else r=mid-1;
     }
     mid=l+(r-l)/2;
     if(ans[mid]>y) mid--;
     return mid;


}

signed main(){
    freopen("scmax.in","r",stdin);
    freopen("scmax.out","w",stdout);
    cin >> n;
    while(n--){
        cin >> x;
        if(!ans.size()){ ans.push_back(x); continue;}
        if(x>ans[ans.size()-1]){ ans.pb(x); continue;}
        int ho=binsearch(0,ans.size()-1,x);
        ans[ho+1]=x;
    }
    cout<<ans.size();

}