def test(N,K,H,L):
    assert 1 <= N <= 2000
    assert 1 <= K <= 10**9
    assert len(H) == N
    assert all(1 <= h <= 10**9 for h in H)
    assert len(L) == N
    assert all(len(l) == 2 for l in L)
    assert all(all(1 <= x <= 10**9 for x in l) for l in L)

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

    test(N,K,H,L)

    ans = N
    for i in range(N):
        for j in range(N):
            if (L[i][0]-L[j][0])**2+(L[i][1]-L[j][1])**2 <= K**2:
                if H[i] < H[j]:
                    ans -= 1
                    break
    
    print(ans)


solve()