number theories for newbeas

#include<bits/stdc++.h>
using namespace std;




void myfunc(long long n)
{
    long long low=0;
    long long k,i,num=0,diff,div;
    vector<long long>v;

    while(n!=0)
    {
        k=n%10;
        n/=10;
        v.push_back(k);
    }
    sort(v.begin(),v.end());
    for(i=v.size()-1;i>=0;i--)
    {
        num=(num*10)+v[i];
    }
    for(i=0;i<v.size();i++)
    {
        low=low*10+v[i];
    }
    diff=num-low;
    div=diff/9;

    printf("%lld - %lld = %lld = 9 * %lld\n",num,low,diff,div);
}
int main()
{
    long long n,k,num=0,i;
    while(scanf("%lld",&n)==1){
    myfunc(n);
    }
    return 0;
}