Problem Statement

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.