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[Leetcode Week14]Path Sum II
Path Sum II 题解 原创文章,拒绝转载 题目来源:https://leetcode.com/problems/path sum ii/description/ Description Given a binary tree and a sum, find all root to leaf ...
分类:其他好文   时间:2017-12-06 23:54:04    阅读次数:308
Leetcode 257: Binary Tree Paths
Given a binary tree, return all root-to-leaf paths. For example, given the following binary tree: All root-to-leaf paths are: ...
分类:其他好文   时间:2017-12-05 14:29:59    阅读次数:165
[LeetCode] Binary Tree Upside Down
Given a binary tree where all the right nodes are either leaf nodes with a sibling (a left node that shares the same parent node) or empty, flip it up ...
分类:其他好文   时间:2017-12-02 13:06:06    阅读次数:144
LeetCode 107.Binary Tree Level Order Traversal II
Given a binary tree, return the bottom-up level order traversal of its nodes' values. (ie, from left to right, level by level from leaf to root). For ...
分类:其他好文   时间:2017-11-28 21:51:32    阅读次数:116
Leetcode 112: Path Sum
Given a binary tree and a sum, determine if the tree has a root-to-leaf path such that adding up all the values along the path equals the given sum. F ...
分类:其他好文   时间:2017-11-18 11:22:34    阅读次数:139
Leetcode 113: Path Sum II
Given a binary tree and a sum, find all root-to-leaf paths where each path's sum equals the given sum. For example:Given the below binary tree and sum ...
分类:其他好文   时间:2017-11-18 11:07:42    阅读次数:122
设计模式6(组合模式,模板方法,策略模式)
组合模式 将对象组合为"部分-整体"的层次结构,组合模式使得用户对单个对象和组合对象的使用统一的接口 关键在于抽象类的定义,为leaf 和composite提供了统一的接口 装饰者模式 可以将装饰者支持组合模式需要的一些功能 享元模式 当组合模式中出现大量相似的组件对象并且状态可以从组件对象分离 迭 ...
分类:其他好文   时间:2017-11-09 11:38:08    阅读次数:155
(转载)深入super,看Python如何解决钻石继承难题
1. Python的继承以及调用父类成员 python子类调用父类成员有2种方法,分别是普通方法和super方法 假设Base是基类 class Base(object): def __init__(self): print “Base init” 则普通方法如下 class Leaf(Base): ...
分类:编程语言   时间:2017-11-02 16:10:29    阅读次数:234
玫瑰花
import turtle import sys turtle.down() turtle.pencolor(1,0,0) def leaf(startx ,starty , direction): turtle.up(); turtle.goto(startx,starty) turtle.dow... ...
分类:其他好文   时间:2017-10-27 21:37:27    阅读次数:188
257. Binary Tree Paths
Given a binary tree, return all root-to-leaf paths. For example, given the following binary tree: All root-to-leaf paths are: ...
分类:其他好文   时间:2017-10-24 14:10:20    阅读次数:125
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