cassino_game created by wojkos - https://repl.it/@wojkos/cassinogame

main.rb

# wined coins
n1 = 10
n2 = 18
# used all-in
k1 = 10
k2 = 2

def solution(n, k)
  steps = 0
  while n > 1
    if n.even? and k > 0
      n /= 2
    else
     n -= 1
    end
    steps += 1
  end
  steps
end

p solution(n1, k1) == 4
p solution(n2, k2) == 5