N = gets.to_i
S, T = gets.split.map(&:to_i)
A = gets.split.map(&:to_i)

R1 = [0]
R2 = [0]

(S).upto(T - 2) do |i|
  R1 << R1.last + A[i]
end

(S - 2).downto(T - N) do |i|
  R2 << R2.last + A[i]
end

x = A[S - 1]
y = A[T - 1]
c1 = T - S - 1
c2 = S + N - T - 1

if c1.even? && c2.even?
  x += R1[c1 / 2] + R2[c2 / 2]
  y += (R1.last - R1[c1 / 2]) + (R2.last - R2[c2 / 2])
elsif c1.even?
  x += R1[c1 / 2] + R2[c2 / 2 + 1]
  y += (R1.last - R1[c1 / 2]) + (R2.last - R2[c2 / 2 + 1])
elsif c2.even?
  x += R1[c1 / 2 + 1] + R2[c2 / 2]
  y += (R1.last - R1[c1 / 2 + 1]) + (R2.last - R2[c2 / 2])
else
  x1 = x + R1[c1 / 2] + R2[c2 / 2 + 1]
  y1 = y + (R1.last - R1[c1 / 2]) + (R2.last - R2[c2 / 2 + 1])
  x2 = x + R1[c1 / 2 + 1] + R2[c2 / 2]
  y2 = y + (R1.last - R1[c1 / 2 + 1]) + (R2.last - R2[c2 / 2])

  if x1 - y1 < x2 - y2
    x, y = x2, y2
  else
    x, y = x1, y1
  end
end

puts x - y