Clique in the Divisibility Graph - Problem

As you must know, the maximum clique problem in an arbitrary graph is NP-hard. Nevertheless, for some graphs of specific kinds it can be solved effectively.

Just in case, let us remind you that a clique in a non-directed graph is a subset of the vertices of a graph, such that any two vertices of this subset are connected by an edge. In particular, an empty set of vertexes and a set consisting of a single vertex, are cliques.

Let's define a divisibility graph for a set of positive integers A={a₁,a₂,...,a_n} as follows. The vertices of the given graph are numbers from set A, and two numbers a_i and a_j (i≠j) are connected by an edge if and only if either a_i is divisible by a_j, or a_j is divisible by a_i.

You are given a set of non-negative integers A. Determine the size of a maximum clique in a divisibility graph for set A.

Input

The first line contains integer n (1≤n≤10⁶), that sets the size of set A.

The second line contains n distinct positive integers a₁,a₂,...,a_n (1≤a_i≤10⁶) − elements of subset A. The numbers in the line follow in the ascending order.

Output

Print a single number − the maximum size of a clique in a divisibility graph for set A.

Examples

Input

8
3 4 6 8 10 18 21 24

Output

Note

In the first sample test a clique of size 3 is, for example, a subset of vertexes {3,6,18}. A clique of a larger size doesn't exist in this graph.

2576: Clique in the Divisibility Graph

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