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

table = [None] * 61


def is_impossible(flag):
    if flag: print(0);exit()


def set_table(x, q):
    if table[x] is None:
        table[x] = q
    else:
        is_impossible(table[x] != q)


for i in range(N - 1):
    diff = A[i + 1] - A[i]
    x = A[i + 1] ^ A[i]
    is_impossible(diff == 0)
    if diff > 0:
        set_table(x.bit_length() - 1, 0)
    elif diff < 0:
        set_table(x.bit_length() - 1, 1)


def f(x):
    if x < 0: return 0

    dp_same, dp_smaller = 1, 0
    for i in range(60, -1, -1):
        t = table[i]
        if (x >> i) & 1:
            if t is None:
                dp_smaller = dp_same + dp_smaller * 2
            elif t == 0:
                dp_same, dp_smaller = 0, dp_same + dp_smaller
        else:
            if t is None:
                dp_smaller *= 2
            elif t == 1:
                dp_same = 0
    return dp_same + dp_smaller


print(f(R) - f(L - 1))