蓝桥杯-信号覆盖

输入样例

10 10 2 5
0 0
7 0

输出样例

57

 代码

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        int W = scan.nextInt();     //长
        int H = scan.nextInt();     //高
        int n = scan.nextInt();     //位置的数量
        int r = scan.nextInt();     //半径
        int[][] arr = new int[W + 1][H + 1];    //将矩形区域的点放入数组
        for (int i = 0; i < W + 1; i++) {
            for (int j = 0; j < H + 1; j++) {
                arr[i][j] = -1;     //赋值为-1
            }
        }
        for (int i = 0; i < n; i++) {
            int x = scan.nextIn