n = int(input()) s, t = map(int, input().split()) a = list(map(int, input().split())) s -= 1 t -= 1 s1 = [] for ind in range(s + 1, 2 * n): if ind % n != t: s1.append(a[ind % n]) else: break s2 = [] for ind in range(t + 1, 2 * n): if ind % n != s: s2.append(a[ind % n]) else: break s2 = s2[::-1] len_s1 = len(s1) len_s2 = len(s2) ans1 = a[s] + sum(s1[:(1 + len_s1) // 2]) + sum(s2[:len_s2 // 2]) ans2 = a[s] + sum(s1[:len_s1 // 2]) + sum(s2[:(1 + len_s2) // 2]) ans = max(ans1, ans2) - (sum(a) - max(ans1, ans2)) print(ans)