Score : $200$ points
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.
Input is given from Standard Input in the following format:
$N$ $M$ $A_1$ $...$ $A_N$
If $M$ popular items can be selected, print Yes; otherwise, print No.
4 1 5 4 2 1
Yes
There were $12$ votes in total. The most popular item received $5$ votes, and we can select it.
3 2 380 19 1
No
There were $400$ votes in total. The second and third most popular items received less than $\dfrac{1}{4\times 2}$ of the total number of votes, so we cannot select them. Thus, we cannot select two popular items.
12 3 4 56 78 901 2 345 67 890 123 45 6 789
Yes