N,K = map(int,input().split())
H = list(map(int,input().split()))
Z = [list(map(int,input().split())) for _ in range(N)]
X = [set() for _ in range(N)]

for a in range(N):
    for b in range(N):
        if a != b:
            x1,y1,x2,y2 = Z[a][0],Z[a][1],Z[b][0],Z[b][1]
            if (x1-x2)**2 + (y1-y2)**2 <= K**2:
                if H[a] < H[b]:
                    X[a].add(b)

Ans = 0
for a in range(N):
    if len(X[a]) == 0:
        Ans += 1
print(Ans)