java 蓝桥杯 最大乘积（DP）

import java.util.Scanner;

public class Main {
    static int[] arr = new int[41];
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        int K = sc.nextInt();
        String s = sc.next();
        for(int i = 0;i