Commit 106ed64

committed

🐱(binary-search): 719. 找出第 k 小的距离对

1 parent 173b494 commit 106ed64Copy full SHA for 106ed64

File tree

1 file changed

+39

-0

lines changed

docs/algorithm/research/binary-search
- README.md

1 file changed

+39

-0

lines changed

`‎docs/algorithm/research/binary-search/README.md‎`

Lines changed: 39 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -1008,6 +1008,45 @@ class Solution:`
`1008`	`1008`	`return arr[left:left + k]`
`1009`	`1009`	```
`1010`	`1010`
	`1011`	`+## 719. 找出第 k 小的距离对`
	`1012`	`+`
	`1013`	`+[原题链接](https://leetcode-cn.com/problems/find-k-th-smallest-pair-distance/)`
	`1014`	`+`
	`1015`	`+### 解一:二分查找 + 双指针`
	`1016`	`+`
	`1017`	+- k 值落在 `[0, max(nums) - min(nums)]` 中,此为二分查找范围
	`1018`	`+- 以此范围内的值查找小于该值的距离对数量`
	`1019`	`+`
	`1020`	+```python
	`1021`	`+class Solution:`
	`1022`	`+ def smallestDistancePair(self, nums: List[int], k: int) -> int:`
	`1023`	`+ nums.sort()`
	`1024`	`+`
	`1025`	`+ def get_mid_count(target):`
	`1026`	`+ # 双指针`
	`1027`	`+ i, count = 0, 0`
	`1028`	`+ for j in range(1, len(nums)):`
	`1029`	`+ while nums[j] - nums[i] > target:`
	`1030`	`+ i += 1`
	`1031`	`+ count += j - i`
	`1032`	`+ return count`
	`1033`	`+`
	`1034`	`+ # 第 k 小距离在 [left, right] 之间`
	`1035`	`+ left = 0`
	`1036`	`+ right = nums[-1] - nums[0]`
	`1037`	`+ while left < right:`
	`1038`	`+ mid = (left + right) // 2`
	`1039`	`+ # 计算小于等于 mid 的数量`
	`1040`	`+ count = get_mid_count(mid)`
	`1041`	`+ if count >= k:`
	`1042`	`+ # 如果数量大于 k,说明 mid 大了或就是结果`
	`1043`	`+ right = mid`
	`1044`	`+ else:`
	`1045`	`+ # 如果数量小于 k,说明 mid 小了`
	`1046`	`+ left = mid + 1`
	`1047`	`+ return left`
	`1048`	+```
	`1049`	`+`
`1011`	`1050`	`## 744. 寻找比目标字母大的最小字母`
`1012`	`1051`
`1013`	`1052`	`[原题链接](https://leetcode-cn.com/problems/find-smallest-letter-greater-than-target/)`

0 commit comments

Comments

(0)

Navigation Menu

Search code, repositories, users, issues, pull requests...

Provide feedback

Saved searches

Use saved searches to filter your results more quickly

Uh oh!

Commit 106ed64

File tree

1 file changed

1 file changed

`‎docs/algorithm/research/binary-search/README.md‎`

0 commit comments