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Update 0347.前K个高频元素.md

原文打错字了:第207行应为"扫描所有频率的数值",原文为"扫面所有频率的数值"

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Original file line number	Diff line number	Diff line change
`@@ -204,7 +204,7 @@ class Solution:`
`204`	`204`	`#定义一个小顶堆,大小为k`
`205`	`205`	`pri_que = [] #小顶堆`
`206`	`206`
`207`		`- #用固定大小为k的小顶堆,扫面所有频率的数值`
	`207`	`+ #用固定大小为k的小顶堆,扫描所有频率的数值`
`208`	`208`	`for key, freq in map_.items():`
`209`	`209`	`heapq.heappush(pri_que, (freq, key))`
`210`	`210`	`if len(pri_que) > k: #如果堆的大小大于了K,则队列弹出,保证堆的大小一直为k`

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