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@ -45,7 +45,7 @@ Find the total sum of all root-to-leaf numbers.
## 解题思路
- 这一题是第 257 题的变形题，第 257 题要求输出每条从根节点到叶子节点的路径，这一题变成了把每一个从根节点到叶子节点的数字都串联起来，再累加每条路径，求出最后的总和。实际做题思路基本没变
- 这一题是第 257 题的变形题，第 257 题要求输出每条从根节点到叶子节点的路径，这一题变成了把每一个从根节点到叶子节点的数字都串联起来，再累加每条路径，求出最后的总和。实际做题思路基本没变。运用前序遍历的思想，当从根节点出发一直加到叶子节点，每个叶子节点汇总一次。
## 代码