import sys
input = sys.stdin.readline

N=int(input())
s,t=map(int,input().split())
A=list(map(int,input().split()))

s-=1
t-=1

S1=A[s]
S2=A[t]

if s<t:
    B=A[s+1:t]
    C=A[t+1:N]+A[:s]

    #print(B,C)

    if len(B)%2==0 and len(C)%2==0:
        S1+=sum(B[:len(B)//2])
        S1+=sum(C)-sum(C[:len(C)//2])

        print(S1-(sum(A)-S1))
        
    elif len(B)%2==0 and len(C)%2==1:
        S1+=sum(B[:len(B)//2])
        S1+=sum(C)-sum(C[:len(C)//2])

        print(S1-(sum(A)-S1))
        
    elif len(B)%2==1 and len(C)%2==0:
        S1+=sum(B[:len(B)//2+1])
        S1+=sum(C)-sum(C[:len(C)//2])

        print(S1-(sum(A)-S1))
        
    elif len(B)%2==1 and len(C)%2==1:
        S1+=sum(B[:len(B)//2])
        S1+=sum(C)-sum(C[:len(C)//2+1])

        if B[len(B)//2]>C[len(C)//2]:
            S1+=B[len(B)//2]
        else:
            S1+=C[len(C)//2]

        print(S1-(sum(A)-S1))

else:
    C=A[t+1:s]
    B=A[s+1:N]+A[:t]

    if len(B)%2==0 and len(C)%2==0:
        S1+=sum(B[:len(B)//2])
        S1+=sum(C)-sum(C[:len(C)//2])

        print(S1-(sum(A)-S1))
        
    elif len(B)%2==0 and len(C)%2==1:
        S1+=sum(B[:len(B)//2])
        S1+=sum(C)-sum(C[:len(C)//2])

        print(S1-(sum(A)-S1))
        
    elif len(B)%2==1 and len(C)%2==0:
        S1+=sum(B[:len(B)//2+1])
        S1+=sum(C)-sum(C[:len(C)//2])

        print(S1-(sum(A)-S1))
        
    elif len(B)%2==1 and len(C)%2==1:
        S1+=sum(B[:len(B)//2])
        S1+=sum(C)-sum(C[:len(C)//2+1])

        if B[len(B)//2]>C[len(C)//2]:
            S1+=B[len(B)//2]
        else:
            S1+=C[len(C)//2]

        print(S1-(sum(A)-S1))