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programmercarl
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problems/0347.前K个高频元素.md
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# 思路
《代码随想录》算法视频公开课：[优先级队列正式登场！大顶堆、小顶堆该怎么用？| LeetCode：347.前 K 个高频元素](https://www.bilibili.com/video/BV1Xg41167Lz)，相信结合视频在看本篇题解，更有助于大家对本题的理解。
<p align="center">
<iframe src="//player.bilibili.com/player.html?aid=514643371&bvid=BV1Xg41167Lz&cid=808260290&page=1" scrolling="no" border="0" frameborder="no" framespacing="0" allowfullscreen="true" width=750 height=500> </iframe>
</p>
这道题目主要涉及到如下三块内容：
1. 要统计元素出现频率
2. 对频率排序