#include <stdio.h>

int dis(int x1, int x2, int y1, int y2)
{
    return (x2 - x1) * (x2 - x1) + (y2 - y1) * (y2 - y1);
}

int main()
{
    int N, K;
    scanf("%d %d", &N, &K);
    
    int H[N], X[N], Y[N];
    for (int i = 0; i < N; i++) {
        scanf("%d", &H[i]);
    }
    
    for (int i = 0; i < N; i++) {
        scanf("%d %d", &X[i], &Y[i]);
    }
    
    int n = N;
    for (int i = 0; i < N; i++) {
        for (int j = i + 1; j < N; j++) {
            if (H[i] < H[j] && dis(X[i], X[j], Y[i], Y[j]) <= K * K) {
                n--;
                break;
            }
        }
    }
    
    printf("%d\n", n);
    
    return 0;
}