#include <cstdio>
#include <climits>
using namespace std;
int a[100010],t[100010];
int main()
{
    int n,k,i,j,max=INT_MIN;
    freopen("scmax.in","r",stdin);
    freopen("scmax.out","w",stdout);
    scanf("%d",&n);
    for(i=1; i<=n; i++)
    {
        scanf("%d",&a[i]);
        t[i]=1;
        for(j=1; j<=i-1; j++)
            if(a[j]<a[i]&&t[j]+1>t[i])
                {
                    t[i]=t[j]+1;
                }
        if(t[max]<t[i])
            max=i;
    }
    printf("%d",t[max]);

    return 0;
}