题目描述

blablabla

样例

blablabla

算法1

(暴力枚举) $O(n^2)$

blablabla

时间复杂度

参考文献

C++ 代码

blablabla

算法2

(暴力枚举) $O(n^2)$

blablabla

时间复杂度

参考文献

C++ 代码

#include<iostream>
#include<string>
#include<algorithm>
using namespace std;

int main()
{
    string num;
    cin>>num;
    while(num.length()<4){
        num="0"+num;
    }
    while(1){
        sort(num.rbegin(),num.rend());//降序
        string num1=num;
        sort(num.begin(),num.end());//升序
        string num2=num;
        if(num1==num2){
            cout<<num1<<" - "<<num2<<" = 0000"<<endl;
            break;
        }
        num=to_string(stoi(num1)-stoi(num2));
        cout<<num1<<" - "<<num2<<" = "<<num<<endl;
        if(num=="6174") break;
    }

    return 0;
}