if(h->ref--)return;
习题链接：LeetCode 496. 下一个更大元素 I
，推荐阅读同城约会获取更多信息
def close(self) - None:
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Players can also rearrange and shuffle the board to make spotting connections easier. Additionally, each group is color-coded with yellow being the easiest, followed by green, blue, and purple. Like Wordle, you can share the results with your friends on social media.