import Control.Applicative
import Data.List (sortBy)
import Data.Int

readInts :: IO [Int64]
readInts = map read . words <$> getLine

main = do
  [n, v] <- readInts
  cs <- readInts
  let
    comp (x,y) (x',y') = compare (x*y') (x'*y)
    total = sum cs
    cs' = sortBy comp $ zip (scanl1 (+) cs) [1..]
    f 0 _ = 0
    f x ((a,b):ys) = a * (x `div` b) + f (x `mod` b) ys
   in print $ if v < n then total else total + f (v-n) cs'