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

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

solve()