def dist(X,Y):
    return ((X[0]-Y[0])**2+(X[1]-Y[1])**2)**0.5

n,k=map(int,input().split())
H=list(map(int,input().split()))
xy=[list(map(int,input().split())) for _ in range(n)]

graph=[[] for _ in range(n)]
for i in range(n):
    for j in range(n):
        if H[i]<H[j] and dist(xy[i],xy[j])<=k:
            graph[j].append(i)

used=[False]*n
for i,h in sorted(enumerate(H),key=lambda x:x[1]):
    for ni in graph[i]:
        used[ni]=True

print(n-sum(used))