local n, k, x = io.read("*n", "*n", "*n")
local p = k + x
local q = io.read("*n")
for i = 2, n do
  local a = io.read("*n")
  p, q = math.min(p + k, q + k + x), math.min(p, q) + a
end
z = math.min(p, q)
z = tostring(1LL * z):gsub("LL", "")
print(z)