from bisect import bisect_right
from math import sqrt


def calc_distance_2d(coord1: tuple[int, int], coord2: tuple[int, int]) -> float:
    return sqrt((coord1[0]-coord2[0])**2 + (coord1[1]-coord2[1])**2)


def main():
    N, K = map(int, input().split())
    H = list(map(int, input().split()))
    coords = [tuple(map(int, input().split())) for _ in range(N)]

    shrines = list(zip(H, coords))
    shrines.sort()

    shrines_coord = [coord for _, coord in shrines]
    shrines_year = [hist for hist, _ in shrines]

    ctr = N
    for shrine_hist, shrine_coord in shrines:
        old_idx = bisect_right(shrines_year, shrine_hist)
        for other_coord in shrines_coord[old_idx:]:
            if calc_distance_2d(shrine_coord, other_coord) <= K:
                ctr -= 1
                break
    print(ctr)


if __name__ == "__main__":
    main()