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 / \ 2 3
#!/usr/bin/env python# -*- coding:utf-8 -*- # v = "李杰"# for item in v:# print(item)##################################################################################################### str# name = "alex" # list # 类,列表# li = [1, 12, 9,