java 代码

import java.util.*;
public class Main{
    public static void main(String[] args){
        Scanner sc=new Scanner(System.in);
        div(sc.next(),sc.next());
    }
    static void div(String A,String B){
        int n=A.length(),b=Integer.valueOf(B),r=0;//r余数
        List<Integer> c=new ArrayList<>();//下标0是个位
        for(int i=0;i<n;i++){
            r=r*10+A.charAt(i)-'0';
            c.add(r/b);
            r%=b;
        }
        Collections.reverse(c);//翻转
        while(c.size()>1 && c.get(c.size()-1)==0){//去掉前导0
            c.remove(c.size()-1);
        }
        StringBuilder sb=new StringBuilder();
        for(int i=c.size()-1;i>=0;i--){
            sb.append((char)(c.get(i)+'0'));
        }
        System.out.println(sb.toString());
        System.out.println(r+"");
    }
}