USACO runround

/*
ID: fairyroad
TASK: runround
LANG: C++
*/
#include<iostream>
#include<fstream>
#include<deque>
using namespace std;
ifstream fin("runround.in");
ofstream fout("runround.out");

unsigned long m;
deque<int> digit;
bool flag[10];

inline void reset()
{
    for(int i = 0; i < 10; ++i)
        flag[i] = false;
}
inline int split(unsigned long num)
{
    int i = 0, j;
    reset();
    while(num)
    {
        j = num%10;
        if(j == 0 || flag[j]) return 0;
        digit.push_front(j);
        num /= 10;
        flag[j] = true;
        ++i;
    }
    return i;
}

int main()
{
    fin>>m;
    unsigned long num = m+1;
    while(true)
    {
        int p = split(num);
        if(p)
        {
            int s = 0, cnt = 0, next = 0;
            reset();
            while(cnt!=p)
            {
                next = (digit[s]+next)%p;
                if(!flag[next])
                {
                    flag[next] = true;
                    ++cnt;
                    s = next;
                }
                else break;
            }
            if(s==0 && cnt==p)
            {
                fout<<num<<endl;
                return 0;
            }
        }
        ++num;
    }
}