#include<cstdio>
int n,v[100001],m[100001],i,b[2000001];
int fbin(int x,int y)
{
    int mid=(x+y)/2;
    if((v[i]>m[mid]||m[mid]==0)&&(v[i]<m[mid+1]||m[mid+1]==0)) return mid;
    if(v[i]<m[mid]) return fbin(x,mid-1);
    if(v[i]>m[mid+1]&&mid+1<=y) return fbin(mid+1,y);
    return 0;
}
int main()
{
    int deg;
    freopen("scmax.in","rt",stdin);
    freopen("scmax.out","wt",stdout);
    scanf("%ld",&n);
    int maxim=n;
    for(i=1;i<=n;i++)
        scanf("%ld",&v[i]);
        maxim=n;
    for(i=n;i>=1;i--)
    {
        deg=fbin(maxim,n);
        m[deg]=v[i];
        if(deg!=0)
        b[v[i]]=m[deg+1];
        if(deg<maxim&&deg!=0) maxim=deg;
    }
    printf("%ld\n",n-maxim+1);
    int j=m[maxim];
    while(j!=0) {printf("%ld ",j);j=b[j];}
}