from itertools import accumulate
n = int(input())
s, t = map(int, input().split())
a = list(map(int, input().split()))
vis = [False] * n
vis[s - 1] = True
vis[t - 1] = True
u = []
i = s - 1
while i != t - 1:
    if not vis[i]:
        vis[i] = True
        u.append(a[i])
    i = (i + 1) % n
v = []
i = s - 1
while i != t - 1:
    if not vis[i]:
        vis[i] = True
        v.append(a[i])
    i = (i - 1) % n
base = a[s - 1] - a[t - 1]
if len(u) % 2 == 1 and len(v) % 2 == 1:
    print(base + 2 * max(sum(u[:(len(u) + 1) // 2]) + sum(v[:(len(v)) // 2]), sum(u[:len(u) // 2]) + sum(v[:(len(v) + 1) // 2])) - sum(u) - sum(v))
else:
    print(base + 2 * (sum(u[:(len(u) + 1) // 2]) + sum(v[:(len(v) + 1) // 2])) - sum(u) - sum(v))