中兴警察那道题代码，求黑白鼠那道题代码

package nowcoder.zte;

import java.util.Arrays;

public class Q3 {
    public static void main(String[] args) {
        int n = 4, P = 3, Q = 1;
        int[] arr = {9, 8, 2, 5};
        System.out.println(getMinCount(n, P, Q, arr));
    }

    private static int getMinCount(int n, int p, int q, int[] arr) {
        int max = 0;
        int res = 0;
        boolean flag = true;
        while (flag) {
            max = getMax(arr);
            arr[max] -= p;
            for (int i = 0; i < n; i++) {
                if (i == max)
                    continue;
                arr[i] -= q;
            }
//            System.out.println(Arrays.toString(arr));
            res++;
            flag = false;
            for (int i = 0; i < n; i++) {
                if (arr[i] > 0)
                    flag = true;
            }
        }
        return res;
    }

    private static int getMax(int[] arr) {
        int max = 0;
        int index = 0;
        for (int i = 0; i < arr.length; i++) {
            if (arr[i] > max) {
                max = arr[i];
                index = i;
            }
        }
        return index;
    }
}