d = {}
def f(x,i):
    if (x,i) in d: return d[x,i]
    if x < 0: return 0
    if i==62: return 1
    c = 0
    if res[i]&1: c += f(x//2,i+1)
    if res[i]&2: c += f((x-1)//2,i+1)
    d[x,i] = c
    return c

n,L,R = map(int,input().split())
*a, = map(int,input().split())
res = [3]*62
for x,y in zip(a,a[1:]):
    res[(x^y).bit_length()-1] &= 1<<(x>y)
print(f(R,0)-f(L-1,0))