N, X, Y = gets.split.map(&:to_i) A = gets.split.map(&:to_i) dp1 = Array.new(N, -Float::INFINITY) dp2 = Array.new(N, -Float::INFINITY) diff = -Float::INFINITY 0.upto(N - 2) do |i| diff = [X - A[i], diff + X - A[i]].max if i == 0 dp1[i] = diff else dp1[i] = [dp1[i - 1], diff].max end end diff = -Float::INFINITY (N - 1).downto(1) do |i| diff = [Y - A[i], Y - A[i] + diff].max if i == N - 1 dp2[i] = diff else dp2[i] = [dp2[i + 1], diff].max end end sum = A.sum 0.upto(N - 3) do |i| puts sum + dp1[i] + dp2[i + 2] end