class Solution {
public:
    bool IsContinuous( vector<int> numbers ) {
      //  不能重复，上下界之差不能超过4
      int min = 13, max = 0;
      std::unordered_map<int, int> hash;
      
      for (int i = 0; i < numbers.size(); ++i) {
        if (numbers[i] != 0) {
          if (hash.count(numbers[i])) {
            return false;
          }
          hash[numbers[i]] = i;
          if (numbers[i] >= max) {
            max = numbers[i];
          }
          if (numbers[i] <= min) {
            min = numbers[i];
          }
        }
      }
      
      return (max - min < 5);
    }
};