归档 2016年1月7日

[LeetCode]Sum Root to Leaf Numbers

题目描述:

Given a binary tree containing digits from 0-9 only, each root-to-leaf path could represent a number.

An example is the root-to-leaf path 1->2->3 which represents the number 123.

Find the total sum of all root-to-leaf numbers.

For example,

    1 ...

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