n, k = map(int,input().split())
H = list(map(int,input().split()))
P = []
G = [[] for i in range(n)]
for i in range(n):
    x,y = map(int,input().split())
    P.append([x, y])

for i in range(n):
    x1, y1 = P[i]
    for j in range(n):
        x2, y2 = P[j]
        if(H[i] < H[j]):
            if((x2-x1)**2 + (y2-y1)**2 <= k**2):
                G[i].append(j)

ans = 0
for i in range(n):
    if(len(G[i]) == 0):
        ans += 1

print(ans)