# Hide boxes

Given

`n`

boxes, you would like to hide as many of those boxes inside others as possible. There are several rules that you need to follow:- You can place a small box inside of another larger box only if the larger one is at least twice as large as the small box.

- You can place only 1 box inside another box (No box can contain 2 or more other boxes).

What would be the minimum possible number of visible boxes in the end?

Input

The first line of the input contains a single integer

`n`

(1 β€ n β€ ) the number of boxes.The next line contains

`n`

space-separated integers (1 β€ β€ ) the size of each box. Output

The program should print the least possible number of visible boxes in the end.

Examples

Input | Output |

8
7 5 2 6 4 8 9 2 | 5 |

8
3 1 8 2 6 5 6 9 | 5 |

Explanation

- 7 5 2 6 4 8 9 2 β (2, 5) (2, 6) (7) (4, 8) (9)

- 3 1 8 2 6 5 6 9 β 1 2 3 5 6 6 8 9 β (1, 5) (2, 6) (3, 6) (8) (9)

Β

#### Constraints

Time limit: 0.2 seconds

Memory limit: 512 MB

Output limit: 1 MB