#include<bits/stdc++.h>
using namespace std;
int n,a[10001],dp[10001],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[j]<=a[i]) dp[i]=max(dp[i],dp[j]+1); 
            ans=max(ans,dp[i]);
        } 
    }
    cout<<ans;
    return 0;
}
/**************************************************************
	Problem: 1794
	User: liyunshuo
	Language: C++
	Result: Accepted
	Time:291 ms
	Memory:2152 kb
****************************************************************/