def main():
    N = int(input())
    s, t = map(int, input().split())
    A = list(map(int, input().split()))
    R = A[s:t-1]
    L = A[t:] + A[:s-1]
    len_R = len(R)
    len_L = len(L)
    K = (N-1)//2
    ans = A[s-1]
    Sum_A = sum(A)
    R.insert(0, 0)
    L.insert(0, 0)
    for i in range(1, len_R+1):
        R[i] += R[i-1]
    for i in range(1, len_L+1):
        L[i] += L[i-1]

    for i in range(len_R+1):
        if 0 <= K-i <= len_L:
            try_max = L[K-i] + R[i] + A[s-1]
            if try_max > ans:
                if (len_R - i == 0 or len_R-i >= N//2 - 1) and (len_L == K-i or len_L-(K-i) >= N//2 - 1):
                    ans = try_max
    ans = 2*ans - Sum_A
    print(ans)
    return


if __name__ == "__main__":
    main()