Update stack and queue.
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@@ -356,14 +356,14 @@ comments: true
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int get(int index) {
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// 索引如果越界则抛出异常,下同
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if (index >= size())
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throw std::out_of_range ("索引越界");
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throw out_of_range("索引越界");
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return nums[index];
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}
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/* 更新元素 */
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void set(int index, int num) {
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if (index >= size())
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throw std::out_of_range ("索引越界");
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throw out_of_range("索引越界");
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nums[index] = num;
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}
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@@ -380,7 +380,7 @@ comments: true
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/* 中间插入元素 */
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void insert(int index, int num) {
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if (index >= size())
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throw std::out_of_range ("索引越界");
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throw out_of_range("索引越界");
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// 元素数量超出容量时,触发扩容机制
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if (size() == capacity())
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extendCapacity();
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@@ -396,7 +396,7 @@ comments: true
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/* 删除元素 */
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void remove(int index) {
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if (index >= size())
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throw std::out_of_range ("索引越界");
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throw out_of_range("索引越界");
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// 索引 i 之后的元素都向前移动一位
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for (int j = index; j < size() - 1; j++) {
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nums[j] = nums[j + 1];
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@@ -439,58 +439,58 @@ comments: true
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class MyList:
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""" 构造函数 """
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def __init__(self):
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self._capacity = 10 # 列表容量
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self._nums = [0] * self._capacity # 数组(存储列表元素)
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self._size = 0 # 列表长度(即当前元素数量)
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self._extend_ratio = 2 # 每次列表扩容的倍数
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self.__capacity = 10 # 列表容量
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self.__nums = [0] * self.__capacity # 数组(存储列表元素)
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self.__size = 0 # 列表长度(即当前元素数量)
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self.__extend_ratio = 2 # 每次列表扩容的倍数
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""" 获取列表长度(即当前元素数量) """
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def size(self):
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return self._size
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return self.__size
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""" 获取列表容量 """
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def capacity(self):
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return self._capacity
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return self.__capacity
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""" 访问元素 """
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def get(self, index):
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# 索引如果越界则抛出异常,下同
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assert index < self._size, "索引越界"
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return self._nums[index]
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assert index < self.__size, "索引越界"
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return self.__nums[index]
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""" 更新元素 """
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def set(self, num, index):
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assert index < self._size, "索引越界"
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self._nums[index] = num
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assert index < self.__size, "索引越界"
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self.__nums[index] = num
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""" 中间插入元素 """
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def add(self, num, index=-1):
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assert index < self._size, "索引越界"
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assert index < self.__size, "索引越界"
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if index == -1:
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index = self._size
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index = self.__size
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# 元素数量超出容量时,触发扩容机制
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if self._size == self.capacity():
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if self.__size == self.capacity():
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self.extend_capacity()
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# 索引 i 以及之后的元素都向后移动一位
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for j in range(self._size - 1, index - 1, -1):
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self._nums[j + 1] = self._nums[j]
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self._nums[index] = num
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for j in range(self.__size - 1, index - 1, -1):
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self.__nums[j + 1] = self.__nums[j]
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self.__nums[index] = num
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# 更新元素数量
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self._size += 1
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self.__size += 1
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""" 删除元素 """
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def remove(self, index):
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assert index < self._size, "索引越界"
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assert index < self.__size, "索引越界"
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# 索引 i 之后的元素都向前移动一位
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for j in range(index, self._size - 1):
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self._nums[j] = self._nums[j + 1]
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for j in range(index, self.__size - 1):
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self.__nums[j] = self.__nums[j + 1]
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# 更新元素数量
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self._size -= 1
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self.__size -= 1
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""" 列表扩容 """
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def extend_capacity(self):
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# 新建一个长度为 self._size 的数组,并将原数组拷贝到新数组
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self._nums = self._nums + [0] * self.capacity() * (self._extend_ratio - 1)
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# 新建一个长度为 self.__size 的数组,并将原数组拷贝到新数组
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self.__nums = self.__nums + [0] * self.capacity() * (self.__extend_ratio - 1)
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# 更新列表容量
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self._capacity = len(self._nums)
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self.__capacity = len(self.__nums)
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```
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