09 2017 档案

Excel更改单元格格式后无效
摘要：问题描述： 比如修改了数据的自定义显示格式（日期显示 yyyy"年"m"月"，手机号分段000-0000-0000），应用后发现只有部分生效，或者都不生效，再检查发现格式确实已经设置好了。 解决方案： 这其实是Excel的格式显示问题，一般双击单元格后格式就会自动修正。对于大量数据，可以选择数据—— 阅读全文
posted @ 2017-09-10 08:58 白常福 阅读(10556) 评论(0) 推荐(0)
Find the Difference
摘要：Given two strings s and t which consist of only lowercase letters. String t is generated by random shuffling string s and then add one more letter at 阅读全文
posted @ 2017-09-09 08:25 白常福 阅读(207) 评论(0) 推荐(0)
Two Sum IV - Input is a BST
摘要：Given a Binary Search Tree and a target number, return true if there exist two elements in the BST such that their sum is equal to the given target. E 阅读全文
posted @ 2017-09-07 07:34 白常福 阅读(198) 评论(0) 推荐(0)
Add Digits
摘要：Given a non-negative integer num, repeatedly add all its digits until the result has only one digit. For example: Given num = 38, the process is like: 阅读全文
posted @ 2017-09-06 07:24 白常福 阅读(121) 评论(0) 推荐(0)
Sum of Two Integers
摘要：Calculate the sum of two integers a and b, but you are not allowed to use the operator + and -. Example:Given a = 1 and b = 2, return 3. 分析：不通过四则运算符号完 阅读全文
posted @ 2017-09-06 07:02 白常福 阅读(129) 评论(0) 推荐(0)
Find All Numbers Disappeared in an Array
摘要：Given an array of integers where 1 ≤ a[i] ≤ n (n = size of array), some elements appear twice and others appear once. Find all the elements of [1, n] 阅读全文
posted @ 2017-09-05 07:33 白常福 阅读(140) 评论(0) 推荐(0)
Invert Binary Tree
摘要：Invert a binary tree. to Trivia:This problem was inspired by this original tweet by Max Howell: 分析：翻转二叉树 思路1： 使用递归的方式，时间复杂度为o(n)，空间复杂度为o(n) JAVA CODE 阅读全文
posted @ 2017-09-05 07:02 白常福 阅读(260) 评论(0) 推荐(0)
Detect Capital
摘要：Given a word, you need to judge whether the usage of capitals in it is right or not. We define the usage of capitals in a word to be right when one of 阅读全文
posted @ 2017-09-03 07:58 白常福 阅读(164) 评论(0) 推荐(0)
Maximum Depth of Binary Tree
摘要：Given a binary tree, find its maximum depth. The maximum depth is the number of nodes along the longest path from the root node down to the farthest l 阅读全文
posted @ 2017-09-03 07:43 白常福 阅读(125) 评论(0) 推荐(0)
Max Consecutive Ones
摘要：Given a binary array, find the maximum number of consecutive 1s in this array. Example 1: Input: [1,1,0,1,1,1] Output: 3 Explanation: The first two di 阅读全文
posted @ 2017-09-03 07:29 白常福 阅读(172) 评论(0) 推荐(0)
Single Number
摘要：Given an array of integers, every element appears twice except for one. Find that single one. Note:Your algorithm should have a linear runtime complex 阅读全文
posted @ 2017-09-03 07:14 白常福 阅读(163) 评论(0) 推荐(0)
Nim Game
摘要：You are playing the following Nim Game with your friend: There is a heap of stones on the table, each time one of you take turns to remove 1 to 3 ston 阅读全文
posted @ 2017-09-03 06:41 白常福 阅读(155) 评论(0) 推荐(0)
Longest Uncommon Subsequence I
摘要：Given a group of two strings, you need to find the longest uncommon subsequence of this group of two strings. The longest uncommon subsequence is defi 阅读全文
posted @ 2017-09-03 06:29 白常福 阅读(149) 评论(0) 推荐(0)
Average of Levels in Binary Tree
摘要：Given a non-empty binary tree, return the average value of the nodes on each level in the form of an array. Example 1: Note: 思路：首先要使用层次遍历，因为每次遍历后要计算对应 阅读全文
posted @ 2017-09-01 07:47 白常福 阅读(175) 评论(0) 推荐(0)