leetcode

Solution to some Leetcode problems written in C++
git clone git://git.dimitrijedobrota.com/leetcode.git
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0284.cpp (525B)

      1 class PeekingIterator : public Iterator {
      2     int l_next = -1;
      3     bool has_next = false;
      4 
      5   public:
      6     PeekingIterator(const vector<int> &nums) : Iterator(nums) {
      7         if (!Iterator::hasNext()) return;
      8         l_next = Iterator::next();
      9         has_next = true;
     10     }
     11 
     12     int peek() { return l_next; }
     13 
     14     int next() {
     15         const int crnt = l_next;
     16         has_next = Iterator::hasNext();
     17         if (has_next) l_next = Iterator::next();
     18         return crnt;
     19     }
     20 
     21     bool hasNext() const { return has_next; }
     22 };