# include <bits/stdc++.h>

using namespace std;
const int N=1e4+5;
int a[N],dp[N],n,maxx;
int main(){
	cin>>n;
	for(int i = 1;i<=n;i++){
		cin>>a[i];
		dp[i]=1;
		for(int j=1;j<i;j++)
			if(a[i]>=a[j])
				dp[i]=max(dp[i],dp[j]+1);
		maxx=max(maxx,dp[i]);
	}
	cout<<maxx<<endl;
	return 0;
}