#include<bits/stdc++.h>
using namespace std;
//10
//3 18 7 14 10 12 23 41 16 24
int n,a[10004],dp[10004],ans;
int main(){
    cin>>n;
    for(int i=1;i<=n;i++)
    {
        cin>>a[i];
        dp[i]=1;
        for(int j=i-1;j>=1;j--)
        {
            if(a[i]>=a[j]) dp[i]=max(dp[i],dp[j]+1);
        }
        ans=max(ans,dp[i]);
    }
    cout<<ans;
    return 0;
}
/**************************************************************
	Problem: 1794
	User: zhengyuxuan
	Language: C++
	Result: Accepted
	Time:285 ms
	Memory:2152 kb
****************************************************************/