N = int(input())
assert 4 <= N <= 10 ** 5
s, t = map(int, input().split())
assert 1 <= s <= N
assert 1 <= t <= N
assert s != t
s, t = s-1, t-1
A = [int(a) for a in input().split()]
for a in A:
    assert 1 <= a <= 10 ** 9
su = sum(A)

if s < t:
    X = A[s+1:t]
    Y = (A[t+1:] + A[:s])[::-1]
else:
    X = A[t+1:s][::-1]
    Y = A[s+1:] + A[:t]

x, y = len(X), len(Y)

if x % 2 == y % 2 == 0:
    ans = (sum(X[:x//2] + Y[:y//2]) + A[s]) * 2 - su
elif x % 2 == y % 2 == 1:
    ans = (max(sum(X[:x//2+1] + Y[:y//2]), sum(X[:x//2] + Y[:y//2+1])) + A[s]) * 2 - su
else:
    ans = (sum(X[:(x+1)//2] + Y[:(y+1)//2]) + A[s]) * 2 - su

print(ans)