def count_pins(N, K, X):
    X.sort()
    count = 0
    prev = X[0]
    for i in range(1, N):
        if X[i] - prev >= K:
            count += 1
            prev = X[i]
    return count + 1


N, K = map(int, input().split())
X = list(map(int, input().split()))

result = count_pins(N, K, X)
print(result)