N, K = map(int, input().split())
H = list(map(int, input().split()))
X, Y = [], []
for _ in range(N):
    Xi, Yi = map(int, input().split())
    X.append(Xi)
    Y.append(Yi)
exists = [True]*N

for i in range(N):
    for j in range(i+1, N):
        X_diff = X[i]-X[j]
        Y_diff = Y[i]-Y[j]
        dist = (X_diff**2+Y_diff**2)**0.5
        if dist <= K:
            if H[i] < H[j]:
                exists[i] = False
            if H[j] < H[i]:
                exists[j] = False
print(sum(exists))