fix: stack_operations.png, bubble_sort.py

codes/python/chapter_sorting/bubble_sort.py

@@ -12,7 +12,7 @@ from include import *
 def bubble_sort(nums):
     n = len(nums)
     # 外循环：待排序元素数量为 n-1, n-2, ..., 1
-    for i in range(n - 1, -1, -1):
+    for i in range(n - 1, 0, -1):
         # 内循环：冒泡操作
         for j in range(i):
             if nums[j] > nums[j + 1]:
@@ -23,7 +23,7 @@ def bubble_sort(nums):
 def bubble_sort_with_flag(nums):
     n = len(nums)
     # 外循环：待排序元素数量为 n-1, n-2, ..., 1
-    for i in range(n - 1, -1, -1):
+    for i in range(n - 1, 0, -1):
         flag = False  # 初始化标志位
         # 内循环：冒泡操作
         for j in range(i):

docs/chapter_sorting/bubble_sort.md

@@ -100,7 +100,7 @@ comments: true
     def bubble_sort(nums):
         n = len(nums)
         # 外循环：待排序元素数量为 n-1, n-2, ..., 1
-        for i in range(n - 1, -1, -1):
+        for i in range(n - 1, 0, -1):
             # 内循环：冒泡操作
             for j in range(i):
                 if nums[j] > nums[j + 1]:
@@ -288,7 +288,7 @@ comments: true
     def bubble_sort_with_flag(nums):
         n = len(nums)
         # 外循环：待排序元素数量为 n-1, n-2, ..., 1
-        for i in range(n - 1, -1, -1):
+        for i in range(n - 1, 0, -1):
             flag = False  # 初始化标志位
             # 内循环：冒泡操作
             for j in range(i):