N = int(input())
s, t = map(int, input().split())
s-=1;t-=1
a = list(map(int, input().split()))
sm = sum(a)
if (s+1)%N==t:
    b2 = 0
    for i in range(N//2):
        b2 += a[(t+i)%N]
    print(sm-2*b2)
    exit()
if (t+1)%N==s:
    b1 = 0
    for i in range((N+1)//2):
        b1 += a[(s+i)%N]
    print(2*b1-sm)
    exit()

a = a+a
if s<t:
    n1 = a[s+1:t]
    n2 = a[t+1:s+N]
    n3 = n1[::-1]
    n4 = n2[::-1]
    l1, l2 = len(n1), len(n2)
    p = a[s]+sum(n1[:l1//2])+sum(n4[:l2//2])
    q = a[t]+sum(n3[:l1//2:])+sum(n2[:l2//2])
else:
    n1 = a[t+1:s]
    n2 = a[s+1:t+N]
    n3 = n1[::-1]
    n4 = n2[::-1]
    l1, l2 = len(n1), len(n2)
    p = a[s]+sum(n2[:l2//2])+sum(n3[:l1//2])
    q = a[t]+sum(n4[:l2//2])+sum(n1[:l1//2])

if len(n1)%2==0 and len(n2)%2==0:
    print(p-q)
elif len(n1)%2==1 and len(n2)%2==1:
    p += max(n1[len(n1)//2],n2[len(n2)//2])
    q += min(n1[len(n1)//2],n2[len(n2)//2])
    print(p-q)
else:
    m = n1[len(n1)//2] if len(n1)%2==1 else n2[len(n2)//2]
    print(p+m-q)