Senioritis
Description
The seniors of Cupertino Competitive Programming Club are going through terrible senioritis! If their GPA gets below $2.8$, they may just abandon the club altogether!!! Thankfully, you recently discovered a potion for senioritis... but it takes a long time to work, only works on one person at a time, and will only improve the senior's GPA by $1.0$.
Given the amount of time the potion takes to work, the amount of time you have to cure their senioritis, and a list of GPAs, please output the least amount of people who will be unable to be cured of their senioritis.
The first line contains two number $m$ and $k$ which represent the amount of time the potion takes to work and the amount of time you have to cure their senioritis respectively. The second line contains contains $n$, the number of seniors you have to cure. The next $n$ lines contain a single number $a_i$, $0 \le a_i \le 5$ which represents the gpa of the $i$th senior.
The output should be exactly one number representing the least amount of people who will be unable to be cured of their senioritis.
Input
The first line contains two number $m$ and $k$ which represent the amount of time the potion takes to work and the amount of time you have to cure their senioritis respectively. The second line contains contains $n$, the number of seniors you have to cure. The next $n$ lines contain a single number $a_i$, $0 \le a_i \le 5$ which represents the gpa of the $i$th senior.
Output
The output should be exactly one number representing the least amount of people who will be unable to be cured of their senioritis.
5 21
6
1.7
3.9
4
2.6
0.7
2.4
1
Note
In the above example, you know that the potion takes $5$ units of time to make, and you have $21$ units of time to cure all the seniors. The $1.7$ GPA is atrocious, so you could choose to try to cure that first, taking away ($2$ uses of the potion) $\cdot$ ($5$ units of time) $= 10$ units of time used -> $11$ units left. Then you could get the $2.6$ GPA up to $3.6$, but you'd only have 6 units of time left and would be able to cure the $2.4$ GPA, but not the $0.7$.