import sys
input = lambda : sys.stdin.readline().rstrip()

sys.setrecursionlimit(2*10**5+10)
write = lambda x: sys.stdout.write(x+"\n")
debug = lambda x: sys.stderr.write(x+"\n")
writef = lambda x: print("{:.12f}".format(x))


n,L,R = list(map(int, input().split()))
a = list(map(int, input().split()))
l = [-1]*62
ng = 0
for i in range(1,n):
    v = a[i]
    p = a[i-1]
    for b in range(62)[::-1]:
        if (v>>b&1) == (p>>b&1):
            continue
        if v>>b&1:
            if l[b]==1:
                ng = 1
                break
            l[b] = 0
        else:
            if l[b]==0:
                ng = 1
                break
            l[b] = 1
        break
    if ng:
        break
def sub(r):
    if r<0:
        return 0
    ll = []
    v = 0
    for i in range(62)[::-1]:
        if l[i]==-1:
            if v+(1<<i)<=r:
                ll.append(1)
                v += (1<<i)
            else:
                ll.append(0)
    v = 1
    res = 0
#     print(ll[-10:])
    for b in ll[::-1]:
        res += b*v
        v *= 2
    return res + 1
if ng:
    ans = 0
else:
    val = 0
    for i in range(62):
        if l[i]==1:
            val += (1<<i)
    ans = sub(R-val) - sub(L-val-1)
print(ans)