#include <iostream>
#include <vector>

using namespace std;

vector<int> f(int a )
{
    if (a<=0)
        throw "ilegal";
    vector<int> rez;
    while (a>0)
        {
            rez.push_back(a%10);
            a = a /10;
        }
        return rez;

}

int main()
{

    return 0;
}