#!/usr/bin/env python3.8
# %%
import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines
from functools import lru_cache

# %%
N, L, R, *A = map(int, read().split())
status = [-1] * 64


# %%
def calc_bitwise_status():
    for a, b in zip(A, A[1:]):
        n = (a ^ b).bit_length() - 1
        aa = (a >> n) & 1
        if aa == 0:
            if status[n] == 1:
                return False
            status[n] = 0
        else:
            if status[n] == 0:
                return False
            status[n] = 1
    return True


# %%
if not calc_bitwise_status():
    print(0)
    exit()


# %%
@lru_cache(None)
def f(N, i):
    if N < 0:
        return 0
    if i == 63:
        return 1
    s = status[i]
    q, r = divmod(N, 2)
    if s == 0:
        return f(N // 2, i + 1)
    elif s == 1:
        return f((N - 1) // 2, i + 1)
    else:
        return f(N // 2, i + 1) + f((N - 1) // 2, i + 1)


# %%
print(f(R, 0) - f(L - 1, 0))