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CyC2018
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# 10.1 斐波那契数列
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## 题目链接
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[NowCoder](https://www.nowcoder.com/practice/c6c7742f5ba7442aada113136ddea0c3?tpId=13&tqId=11160&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
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## 题目描述
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<!--<div align="center"><img src="https://latex.codecogs.com/gif.latex?f(n)=\left\{\begin{array}{rcl}0&&{n=0}\\1&&{n=1}\\f(n-1)+f(n-2)&&{n>1}\end{array}\right." class="mathjax-pic"/></div> <br> -->
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<div align="center"> <img src="https://cs-notes-1256109796.cos.ap-guangzhou.myqcloud.com/45be9587-6069-4ab7-b9ac-840db1a53744.jpg" width="300px"> </div><br>
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<div align="center"> <img src="https://cs-notes-1256109796.cos.ap-guangzhou.myqcloud.com/45be9587-6069-4ab7-b9ac-840db1a53744.jpg" width="330px"> </div><br>
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## 解题思路
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# 10.2 矩形覆盖
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## 题目链接
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[NowCoder](https://www.nowcoder.com/practice/72a5a919508a4251859fb2cfb987a0e6?tpId=13&tqId=11163&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
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## 题目描述
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<!-- <div align="center"><img src="https://latex.codecogs.com/gif.latex?f(n)=\left\{\begin{array}{rcl}1&&{n=1}\\2&&{n=2}\\f(n-1)+f(n-2)&&{n>1}\end{array}\right." class="mathjax-pic"/></div> <br> -->
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<div align="center"> <img src="https://cs-notes-1256109796.cos.ap-guangzhou.myqcloud.com/508c6e52-9f93-44ed-b6b9-e69050e14807.jpg" width="350px"> </div><br>
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<div align="center"> <img src="https://cs-notes-1256109796.cos.ap-guangzhou.myqcloud.com/508c6e52-9f93-44ed-b6b9-e69050e14807.jpg" width="370px"> </div><br>
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```java
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public int RectCover(int n) {
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# 10.3 跳台阶
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## 题目链接
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[NowCoder](https://www.nowcoder.com/practice/8c82a5b80378478f9484d87d1c5f12a4?tpId=13&tqId=11161&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
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## 题目描述
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# 10.4 变态跳台阶
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## 题目链接
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[NowCoder](https://www.nowcoder.com/practice/22243d016f6b47f2a6928b4313c85387?tpId=13&tqId=11162&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
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## 题目描述
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# 60. n 个骰子的点数
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## 题目链接
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[Lintcode](https://www.lintcode.com/en/problem/dices-sum/)
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## 题目描述
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### 动态规划
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使用一个二维数组 dp 存储点数出现的次数，其中 dp[i][j] 表示前 i 个骰子产生点数 j 的次数。
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使用一个二维数组 dp 存储点数出现的次数，其中 dp\[i]\[j] 表示前 i 个骰子产生点数 j 的次数。
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空间复杂度：O(N<sup>2</sup>)
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# 61. 扑克牌顺子
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## 题目链接
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[NowCoder](https://www.nowcoder.com/practice/762836f4d43d43ca9deb273b3de8e1f4?tpId=13&tqId=11198&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
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## 题目描述
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# 62. 圆圈中最后剩下的数
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## 题目链接
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[NowCoder](https://www.nowcoder.com/practice/f78a359491e64a50bce2d89cff857eb6?tpId=13&tqId=11199&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
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## 题目描述
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# 63. 股票的最大利润
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[Leetcode](https://leetcode.com/problems/best-time-to-buy-and-sell-stock/description/)
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## 题目链接
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[Leetcode：121. Best Time to Buy and Sell Stock ](https://leetcode.com/problems/best-time-to-buy-and-sell-stock/description/)
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## 题目描述
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# 64. 求 1+2+3+...+n
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## 题目链接
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[NowCoder](https://www.nowcoder.com/practice/7a0da8fc483247ff8800059e12d7caf1?tpId=13&tqId=11200&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
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## 题目描述
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# 65. 不用加减乘除做加法
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## 题目链接
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[NowCoder](https://www.nowcoder.com/practice/59ac416b4b944300b617d4f7f111b215?tpId=13&tqId=11201&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
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## 题目描述
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# 66. 构建乘积数组
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## 题目链接
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[NowCoder](https://www.nowcoder.com/practice/94a4d381a68b47b7a8bed86f2975db46?tpId=13&tqId=11204&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
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## 题目描述
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# 67. 把字符串转换成整数
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## 题目链接
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[NowCoder](https://www.nowcoder.com/practice/1277c681251b4372bdef344468e4f26e?tpId=13&tqId=11202&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
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## 题目描述
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in 栈用来处理入栈（push）操作，out 栈用来处理出栈（pop）操作。一个元素进入 in 栈之后，出栈的顺序被反转。当元素要出栈时，需要先进入 out 栈，此时元素出栈顺序再一次被反转，因此出栈顺序就和最开始入栈顺序是相同的，先进入的元素先退出，这就是队列的顺序。
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<div align="center"> <img src="https://cs-notes-1256109796.cos.ap-guangzhou.myqcloud.com/3ea280b5-be7d-471b-ac76-ff020384357c.gif" width="400"/> </div><br>
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<div align="center"> <img src="https://cs-notes-1256109796.cos.ap-guangzhou.myqcloud.com/3ea280b5-be7d-471b-ac76-ff020384357c.gif" width="450"/> </div><br>
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```java
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Stack<Integer> in = new Stack<Integer>();
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# 10.1 斐波那契数列
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## 题目链接
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[NowCoder](https://www.nowcoder.com/practice/c6c7742f5ba7442aada113136ddea0c3?tpId=13&tqId=11160&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
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## 题目描述
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<!--<div align="center"><img src="https://latex.codecogs.com/gif.latex?f(n)=\left\{\begin{array}{rcl}0&&{n=0}\\1&&{n=1}\\f(n-1)+f(n-2)&&{n>1}\end{array}\right." class="mathjax-pic"/></div> <br> -->
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<div align="center"> <img src="https://cs-notes-1256109796.cos.ap-guangzhou.myqcloud.com/45be9587-6069-4ab7-b9ac-840db1a53744.jpg" width="300px"> </div><br>
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<div align="center"> <img src="https://cs-notes-1256109796.cos.ap-guangzhou.myqcloud.com/45be9587-6069-4ab7-b9ac-840db1a53744.jpg" width="330px"> </div><br>
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## 解题思路
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# 10.2 矩形覆盖
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## 题目链接
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[NowCoder](https://www.nowcoder.com/practice/72a5a919508a4251859fb2cfb987a0e6?tpId=13&tqId=11163&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
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## 题目描述
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<!-- <div align="center"><img src="https://latex.codecogs.com/gif.latex?f(n)=\left\{\begin{array}{rcl}1&&{n=1}\\2&&{n=2}\\f(n-1)+f(n-2)&&{n>1}\end{array}\right." class="mathjax-pic"/></div> <br> -->
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<div align="center"> <img src="https://cs-notes-1256109796.cos.ap-guangzhou.myqcloud.com/508c6e52-9f93-44ed-b6b9-e69050e14807.jpg" width="350px"> </div><br>
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<div align="center"> <img src="https://cs-notes-1256109796.cos.ap-guangzhou.myqcloud.com/508c6e52-9f93-44ed-b6b9-e69050e14807.jpg" width="370px"> </div><br>
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```java
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public int RectCover(int n) {
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# 10.3 跳台阶
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## 题目链接
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[NowCoder](https://www.nowcoder.com/practice/8c82a5b80378478f9484d87d1c5f12a4?tpId=13&tqId=11161&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
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## 题目描述
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# 10.4 变态跳台阶
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## 题目链接
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[NowCoder](https://www.nowcoder.com/practice/22243d016f6b47f2a6928b4313c85387?tpId=13&tqId=11162&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
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## 题目描述
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# 60. n 个骰子的点数
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## 题目链接
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[Lintcode](https://www.lintcode.com/en/problem/dices-sum/)
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## 题目描述
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@ -12,7 +14,7 @@
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### 动态规划
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使用一个二维数组 dp 存储点数出现的次数，其中 dp[i][j] 表示前 i 个骰子产生点数 j 的次数。
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使用一个二维数组 dp 存储点数出现的次数，其中 dp\[i]\[j] 表示前 i 个骰子产生点数 j 的次数。
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空间复杂度：O(N<sup>2</sup>)
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# 61. 扑克牌顺子
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## 题目链接
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[NowCoder](https://www.nowcoder.com/practice/762836f4d43d43ca9deb273b3de8e1f4?tpId=13&tqId=11198&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
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## 题目描述
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# 62. 圆圈中最后剩下的数
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## 题目链接
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[NowCoder](https://www.nowcoder.com/practice/f78a359491e64a50bce2d89cff857eb6?tpId=13&tqId=11199&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
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## 题目描述
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# 63. 股票的最大利润
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[Leetcode](https://leetcode.com/problems/best-time-to-buy-and-sell-stock/description/)
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## 题目链接
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[Leetcode：121. Best Time to Buy and Sell Stock ](https://leetcode.com/problems/best-time-to-buy-and-sell-stock/description/)
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## 题目描述
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# 64. 求 1+2+3+...+n
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## 题目链接
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[NowCoder](https://www.nowcoder.com/practice/7a0da8fc483247ff8800059e12d7caf1?tpId=13&tqId=11200&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
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## 题目描述
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# 65. 不用加减乘除做加法
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## 题目链接
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[NowCoder](https://www.nowcoder.com/practice/59ac416b4b944300b617d4f7f111b215?tpId=13&tqId=11201&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
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## 题目描述
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# 66. 构建乘积数组
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## 题目链接
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[NowCoder](https://www.nowcoder.com/practice/94a4d381a68b47b7a8bed86f2975db46?tpId=13&tqId=11204&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
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## 题目描述
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# 67. 把字符串转换成整数
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## 题目链接
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[NowCoder](https://www.nowcoder.com/practice/1277c681251b4372bdef344468e4f26e?tpId=13&tqId=11202&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
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## 题目描述
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in 栈用来处理入栈（push）操作，out 栈用来处理出栈（pop）操作。一个元素进入 in 栈之后，出栈的顺序被反转。当元素要出栈时，需要先进入 out 栈，此时元素出栈顺序再一次被反转，因此出栈顺序就和最开始入栈顺序是相同的，先进入的元素先退出，这就是队列的顺序。
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<div align="center"> <img src="https://cs-notes-1256109796.cos.ap-guangzhou.myqcloud.com/3ea280b5-be7d-471b-ac76-ff020384357c.gif" width="400"/> </div><br>
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<div align="center"> <img src="https://cs-notes-1256109796.cos.ap-guangzhou.myqcloud.com/3ea280b5-be7d-471b-ac76-ff020384357c.gif" width="450"/> </div><br>
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```java
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Stack<Integer> in = new Stack<Integer>();
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