N, K = map(int, input().split())
H = list(map(int, input().split()))
X, Y = [0] * N, [0] * N
for i in range(N):
    X[i], Y[i] = map(int, input().split())
    
ans = [0] * N
for i in range(N):
    for j in range(N):
        if H[i] < H[j] and (X[i] - X[j]) ** 2 + (Y[i] - Y[j]) ** 2 <= K ** 2:
            ans[i] = 1
            
print(ans.count(0))