N, K, X = gets.split.map(&:to_i)
A = gets.split.map(&:to_i)

dp1 = Array.new(N + 1, Float::INFINITY)
dp2 = Array.new(N + 1, Float::INFINITY)
dp1[0] = A[0]
dp2[0] = K + X

A[1..].each.with_index(1) do |a, i|
  dp1[i] = dp1[i - 1] + a
  dp1[i] = dp2[i - 1] + a if dp1[i] > dp2[i - 1] + a
  dp2[i] = dp2[i - 1] + K
  dp2[i] = dp1[i - 1] + K + X if dp2[i] > dp1[i - 1] + K + X
end

puts [dp1[N - 1], dp2[N - 1]].min