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krahets
2023-04-09 05:12:22 +08:00
parent 01d05cc1f0
commit 37f11aff68
27 changed files with 265 additions and 248 deletions
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chapter_sorting/quick_sort.md
+7 -7
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@@ -101,7 +101,7 @@ comments: true
```python title="quick_sort.py"
def partition(self, nums: list[int], left: int, right: int) -> int:
""" 哨兵划分 """
"""哨兵划分"""
# 以 nums[left] 作为基准数
i, j = left, right
while i < j:
@@ -334,7 +334,7 @@ comments: true
```python title="quick_sort.py"
def quick_sort(self, nums: list[int], left: int, right: int) -> None:
""" 快速排序 """
"""快速排序"""
# 子数组长度为 1 时终止递归
if left >= right:
return
@@ -549,7 +549,7 @@ comments: true
```python title="quick_sort.py"
def median_three(self, nums: list[int], left: int, mid: int, right: int) -> int:
""" 选取三个元素的中位数 """
"""选取三个元素的中位数"""
# 此处使用异或运算来简化代码
# 异或规则为 0 ^ 0 = 1 ^ 1 = 0, 0 ^ 1 = 1 ^ 0 = 1
if (nums[left] < nums[mid]) ^ (nums[left] < nums[right]):
@@ -559,7 +559,7 @@ comments: true
return right
def partition(self, nums: list[int], left: int, right: int) -> int:
""" 哨兵划分（三数取中值） """
"""哨兵划分（三数取中值）"""
# 以 nums[left] 作为基准数
med: int = self.median_three(nums, left, (left + right) // 2, right)
# 将中位数交换至数组最左端
@@ -842,7 +842,7 @@ comments: true
```python title="quick_sort.py"
def quick_sort(self, nums: list[int], left: int, right: int) -> None:
""" 快速排序（尾递归优化） """
"""快速排序（尾递归优化）"""
# 子数组长度为 1 时终止
while left < right:
# 哨兵划分操作
@@ -850,10 +850,10 @@ comments: true
# 对两个子数组中较短的那个执行快排
if pivot - left < right - pivot:
self.quick_sort(nums, left, pivot - 1) # 递归排序左子数组
left = pivot + 1 # 剩余待排序区间为 [pivot + 1, right]
left = pivot + 1 # 剩余待排序区间为 [pivot + 1, right]
else:
self.quick_sort(nums, pivot + 1, right) # 递归排序右子数组
right = pivot - 1 # 剩余待排序区间为 [left, pivot - 1]
right = pivot - 1 # 剩余待排序区间为 [left, pivot - 1]
```
=== "Go"