import sys
input = sys.stdin.readline

N,L,R=map(int,input().split())
A=list(map(int,input().split()))

ANS=[-1]*62

for i in range(1,N):
    if A[i]==A[i-1]:
        print(0)
        sys.exit()

for i in range(61,-1,-1):
    B=[a>>i for a in A]
    C=[b^1 for b in B]

    flagb=1
    flagc=1

    for j in range(1,N):
        if B[j-1]>B[j]:
            flagb=0
        if C[j-1]>C[j]:
            flagc=0

    if flagb and flagc:
        ANS[i]=2
    elif flagb:
        ANS[i]=0
    elif flagc:
        ANS[i]=1
        A=[a^(1<<i) for a in A]
    else:
        print(0)
        sys.exit()

def calc(N,keta):
    if N<0:
        return 0
    
    if keta==-1:
        return 0

    if N & (1<<keta)==0:
        if ANS[keta]==0:
            return calc(N,keta-1)
        
        elif ANS[keta]==1:
            return 0

        elif ANS[keta]==2:
            return calc(N,keta-1)

    else:
        if ANS[keta]==0:
            return calc(N,keta-1)
            
        elif ANS[keta]==1:
            return calc(N,keta-1)
        
        elif ANS[keta]==2:
            return calc(N,keta-1)+(1<<(ANS[:keta].count(2)))

print(calc(R,60)-calc(L-1,60)+1)