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LeetCode/Doc/doc-sample.md

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# candy
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#
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<center>知识点:</center>
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LeetCode/Doc/二叉树的最小深度.md

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# 二叉树的最小深度(minimum-depth-of-binary-tree)
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<center>知识点:</center>
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<center>知识点:</center>
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## 题目描述
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# 计算逆波兰式的值
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<center>知识点:栈</center>
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## 题目描述
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计算逆波兰式的值,给定式子中合法的操作符有+、-、*、/,操作数可能是整型或者另一个表达式,比如:
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> ["2", "1", "+", "3", "*"] -> ((2 + 1) * 3) -> 9
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> ["4", "13", "5", "/", "+"] -> (4 + (13 / 5)) -> 6
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## 解题思路
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利用栈的思想求解
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## 代码
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[这里](../src/n/Solution.java)

LeetCode/src/one/Solution.java

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treeNodeQueue.offer(null);
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}
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} else {
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//判断当前节点是否是叶子节点
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if (curNode.left == null && curNode.right == null) {
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return minDepth;
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}

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