We have held a popularity poll for N items on sale. Item i received A_i votes.
From these N items, we will select M as popular items. However, we cannot select an item with less than $\dfrac{1}{4M}$ of the total number of votes.
If M popular items can be selected, print Yes; otherwise, print No.

-----Constraints-----
- $1 \leq M \leq N \leq 100$
- $1 \leq A_i \leq 1000$
- A_i are distinct.
- All values in input are integers.

-----Input-----
Input is given from Standard Input in the following format:
N M
A_1 ... A_N

-----Output-----
If M popular items can be selected, print Yes; otherwise, print No.

-----Sample Input-----
4 1
5 4 2 1

-----Sample Output-----
Yes

There were 12 votes in total. The most popular item received 5 votes, and we can select it.

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