#include<cstdio>
int main()
{
    int i,j,sol[100001],a[100001],n,max=1,st[100001],v[100001],top=0;
    freopen("scmax.in","r",stdin);
    freopen("scmax.out","w",stdout);
    scanf("%d",&n);
    for(i=1;i<=n;i++) {scanf("%d",&a[i]); sol[i]=1; st[i]=0;}
    for(i=2;i<=n;i++)
    {
        for(j=1;j<=i-1;j++)
        {
            if(a[i]>a[j]&&sol[j]+1>sol[i]) {sol[i]=sol[j]+1; st[i]=j; if(sol[i]>sol[max]) max=i;}
        }
    }
    printf("%d\n",sol[max]);
    while(max)
    {
        v[++top]=a[max];
        max=st[max];
    }
    for(i=top;i>=1;i--) printf("%d ",v[i]);
    return 0;
}