public static int getTotalX(List<Integer> a, List<Integer> b) {
    // Write your code here
    int first = a.get(a.size()-1), end = b.get(0);
    int count = 0;
    for(int start = first ; start<=end ; start += first){
      boolean status = true;
      for(int num : a){
        if(num>start || start%num!=0){
          status = false;
          break;
        }
      }
        if(status){
          for(int val : b){
            if(val<start || val%start!=0){
              status = false;
              break;
            }
          }
          if(status) count++;
        }
    }
    return count;
    }

}