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递归和尾递归
C允许一个函数调用其本身,这种调用过程被称作递归(recursion)。最简单的递归形式是把递归调用语句放在函数结尾即恰在return语句之前。这种形式被称作尾递归或者结尾递归,因为递归调用出现在函数尾部。由于为递归的作用相当于一条循环语句,所以它是最简单的递归形式。递归..
分类:其他好文   时间:2016-02-17 08:20:55    阅读次数:292
LeetCode "Largest BST Subtree"
A typical recursion use: class Solution(object): max_size = 0 # return: isValid, minVal, maxVal, nodeCnt def go(self, root): if root.left is None and
分类:其他好文   时间:2016-02-12 15:09:18    阅读次数:169
[LeetCode][JavaScript]Power of Three
Power of Three Given an integer, write a function to determine if it is a power of three. Follow up:Could you do it without using any loop / recursion
分类:编程语言   时间:2016-02-04 11:36:53    阅读次数:164
Jan 26 - Unique Binary Search Trees; DP; Trees; Recursion & Iteration;
Use DP to generate unique distinct binary trees;Create to two integer value, one "start" to represent the lowest value, and the other "end" to represe...
分类:其他好文   时间:2016-01-27 10:45:04    阅读次数:204
Jan 24 - Restore Ip Addresses; BackTracking; Recursion; DFS;
Code:public class Solution { public List restoreIpAddresses(String s) { List list = new ArrayList(); int len = s.length(); if(...
分类:其他好文   时间:2016-01-25 08:44:45    阅读次数:138
一句话程序
姑且认为是一句话吧 (1 . 语法里根本就没有'一句话'这个概念 ....; 2.其实不是一句话,简短而已)1.recursion>>> n=3>>> f=lambda n:1 if n==1 else fn(n-1)*n>>> f(n)6
分类:其他好文   时间:2016-01-23 12:46:11    阅读次数:143
Jan 19 - Rotate List; Linked List; Two Pointers; Iteration & Recursion;
Use 3 pointers each of them points to the address of Head, The node before Tail and Tail node; When rotating the list step by step, tail.next = head; ...
分类:其他好文   时间:2016-01-20 07:36:05    阅读次数:167
LeetCode 326 Power of Three(3的幂)(递归、Log函数)
翻译给定一个整型数,写一个函数决定它是否是3的幂(翻译可能不太合适……跟进: 你是否可以不用任何循环或递归来完成。原文Given an integer, write a function to determine if it is a power of three.Follow up: Could you do it without using any loop / recursion?分析题意我其...
分类:其他好文   时间:2016-01-19 10:41:30    阅读次数:168
Jan 17 - Permutations; BackTracking; Array; Recursion;
代码:public class Solution { List> resultList = new ArrayList(); boolean flag = false; public List> permute(int[] nums) { int len = nums...
分类:其他好文   时间:2016-01-18 11:52:15    阅读次数:137
[LeetCode] Power of Three 判断3的次方数
Given an integer, write a function to determine if it is a power of three.Follow up:Could you do it without using any loop / recursion?Credits:Special...
分类:其他好文   时间:2016-01-18 06:56:31    阅读次数:131
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