#!/usr/bin/env python3
from decimal import getcontext, Decimal


# Proudly stolen from https://docs.python.org/3/library/decimal.html#recipes
def pi():
    """Compute Pi to the current precision.

    >>> print(pi())
    3.141592653589793238462643383

    """
    getcontext().prec += 2  # extra digits for intermediate steps
    three = Decimal(3)  # substitute "three=3.0" for regular floats
    lasts, t, s, n, na, d, da = 0, three, 3, 1, 0, 0, 24
    while s != lasts:
        lasts = s
        n, na = n + na, na + 8
        d, da = d + da, da + 32
        t = (t * n) / d
        s += t
    getcontext().prec -= 2
    return +s  # unary plus applies the new precision


def sin(x):
    """Return the sine of x as measured in radians.

    The Taylor series approximation works best for a small value of x.
    For larger values, first compute x = x % (2 * pi).

    >>> print(sin(Decimal('0.5')))
    0.4794255386042030002732879352
    >>> print(sin(0.5))
    0.479425538604
    >>> print(sin(0.5+0j))
    (0.479425538604+0j)

    """
    getcontext().prec += 2
    i, lasts, s, fact, num, sign = 1, 0, x, 1, x, 1
    while s != lasts:
        lasts = s
        i += 2
        fact *= i * (i - 1)
        num *= x * x
        sign *= -1
        s += num / fact * sign  # x^(2i+1) / (2i+1)!  for i = 0..∞
    getcontext().prec -= 2
    return +s


# Adapted `sin(x)` using the Taylor series of arcsin
def asin(x):
    """Return the arcsine of x as measured in radians.

    The Taylor series approximation works best for a small value of x.
    For larger values, first compute x = x % (2 * pi).

    >>> print(sin(Decimal('0.5')))
    0.4794255386042030002732879352
    >>> print(sin(0.5))
    0.479425538604
    >>> print(sin(0.5+0j))
    (0.479425538604+0j)

    """
    getcontext().prec += 2
    ii, i, lasts, s, num, fact2, exp, fact = 0, 0, 0, x, x, 1, 1, 1
    while s != lasts:
        lasts = s
        ii += 2
        i += 1
        num *= x * x
        fact2 *= ii * (ii - 1)
        exp *= 4
        fact *= i
        s += num * fact2 / exp / fact / fact / (ii + 1)  # x^(2i+1) * (2i)! / 2^(2i) / (i!)^2 / (2i+1)  for i = 0..∞
    getcontext().prec -= 2
    return +s


getcontext().prec = 142
(n, e), pi_d = map(int, input().split()), pi()
print(sum(1 if e > 2 * r else int(pi_d / asin(Decimal(e) / 2 / Decimal(r))) for r in map(int, input().split())))