vector<int> plusOne(vector<int>& nums,int num)

      {

          add(nums, num);

      }

      void add(vector<int> &nums, int num)

      {

          int c = num;

          for (auto it = nums.rbegin(); it != nums.rend(); it++)

          {

              *it += c;

              *it = *it / ;

              c = *it % ;

          }

          if (c > )

              nums.insert(nums.begin(), );

      }