都是考查DFS。经典回溯算法,问题在于我对该类型的代码不熟悉,目前以参考别人的代码,然后加上自己的实现为主,通过类似的题目加强理解。一、给定一棵二叉树,判断是否存在从root到leaf的路径和等于给定值sum,存在返回true,否则返回false。思路:DFS。代码:
1 private b...
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其他好文 时间:
2014-05-28 23:51:25
阅读次数:
389
题目: Say you have an array for which the ith element
is the price of a given stock on day i. Design an algorithm to find the maximum
profit. You may co...
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其他好文 时间:
2014-05-28 22:37:18
阅读次数:
327
Given an arraySofnintegers, are there
elementsa,b,cinSsuch thata+b+c= 0? Find all unique triplets in the array which
gives the sum of zero.Note:Elemen...
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其他好文 时间:
2014-05-28 16:47:30
阅读次数:
308
问题来源于leetcode上的两道题 Path Sum I &&
II,分别写了两个dfs。1 void dfs(TreeNode node , int sum , ArrayList curPath)2 void
dfs(TreeNode node , int sum , boolean ifEx...
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编程语言 时间:
2014-05-28 13:11:14
阅读次数:
361
http://dev.mysql.com/doc/refman/5.0/en/numeric-type-overview.html 这个M 就是maximum
display width。那什么是maximum display width?看了下面的例子很容易说明了,注意zerofill :my.....
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数据库 时间:
2014-05-28 04:07:12
阅读次数:
314
题目链接题意: find the maximum positive difference
between the price on the ith day and the jth day附上代码: 1 class Solution { 2
public: 3 int maxProfit(ve...
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其他好文 时间:
2014-05-28 03:49:45
阅读次数:
307
原题地址:https://oj.leetcode.com/problems/minimum-path-sum/题意:Given
amxngrid filled with non-negative numbers, find a path from top left to bottom
right w...
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编程语言 时间:
2014-05-28 03:03:13
阅读次数:
320
题目: Say you have an array for which the ith element
is the price of a given stock on day i. Design an algorithm to find the maximum
profit. You may co...
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其他好文 时间:
2014-05-28 00:53:26
阅读次数:
338
原题地址:https://oj.leetcode.com/problems/path-sum/题意:Given
a binary tree and a sum, determine if the tree has a root-to-leaf path such that
adding up all...
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编程语言 时间:
2014-05-26 18:37:11
阅读次数:
295
maximum/largest difference of array
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其他好文 时间:
2014-05-26 17:07:38
阅读次数:
332