#include <string>
#include <vector>
#include <list>
#include <cmath>
#include <algorithm>
#include <map>
#include <set>
#include <iostream>
#include <cstdio>
#include <cstdlib>
using namespace std;

class FromToDivisible {
  public:
    int shortest(int N, int S, int T, vector <int> a, vector <int> b);
};

int FromToDivisible::shortest(int N, int S, int T, vector <int> a, vector <int> b)
{
  int i;
}