CF740A Alyona and copybooks

Alyona 在学校学习 4 门课程，她要去书店买笔记本。她想让 4 门课程的笔记本数量相同。 Alyona 一开始时有 $n$ 个笔记本。书店有 $3$ 种笔记本购买方式： 1. 买一个笔记本，花费 $a$ 卢布； 2. 买两个笔记本，花费 $b$ 卢布； 3. 买三个笔记本，花费 $c$ 卢布。 Alyona 可以购买任意次笔记本。问最少要花多少卢布？

一行，$n$，$a$，$b$，$c$（$1\le n,a,b,c\le 10^9$）。

输出 Alyona 最少需要花多少卢布以保证符合要求。

In the first example Alyona can buy $ 3 $ packs of $ 1 $ copybook for $ 3a=3 $ rubles in total. After that she will have $ 4 $ copybooks which she can split between the subjects equally. In the second example Alyuna can buy a pack of $ 2 $ copybooks for $ b=1 $ ruble. She will have $ 8 $ copybooks in total. In the third example Alyona can split the copybooks she already has between the $ 4 $ subject equally, so she doesn't need to buy anything. In the fourth example Alyona should buy one pack of one copybook.