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7 如何检查一个数字是不是2的乘方
bool result = false; result = CheckPowerOfTwo(8); Console.WriteLine(result.ToString()); static bool CheckPowerOfTwo(ulong number) { ...
分类:其他好文   时间:2014-06-25 20:05:36    阅读次数:141
ORA-01722: invalid number
ORA-01722: invalid number 寻找具体数据原因...
分类:其他好文   时间:2014-06-25 19:44:14    阅读次数:169
Max Points on a Line (Python)
【问题】 Given n points on a 2D plane, find the maximum number of points that lie on the same straight line. 【思路】 对每一个点,分别计算这个点和其他所有点构成的斜率,具有相同斜率最多的点所构成的直线,就是具有最多点的直线。 【代码】 class Point: def __in...
分类:编程语言   时间:2014-06-25 19:34:29    阅读次数:246
MySQL中ROW_NUMBER()函数的替换实现
SELECT t.*, @RowNum := @RowNum + 1 AS RowNumFROM t, (SELECT @RowNum := 0) AS myRowsMySQL中没有ROW_NUMBER()函数,可以用以上代码替换。
分类:数据库   时间:2014-06-25 17:32:15    阅读次数:248
leetcode--3Sum Closest
Given an arraySofnintegers, find three integers inSsuch that the sum is closest to a given number, target. Return the sum of the three integers. You m...
分类:其他好文   时间:2014-06-25 15:26:21    阅读次数:203
Leetcode Letter Combinations of a Phone Number
Given a digit string, return all possible letter combinations that the number could represent.A mapping of digit to letters (just like on the telephon...
分类:其他好文   时间:2014-06-25 09:15:12    阅读次数:362
解决java.sql.SQLException: ORA-01789: query block has incorrect number of result columns
java.sql.SQLException: ORA-01789: query block has incorrect number of result columns at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:125) at oracle.jdbc.driver.T4CTTIoer...
分类:数据库   时间:2014-06-25 07:39:35    阅读次数:481
LeetCode: Sum Root to Leaf Numbers [129]
【题目】 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 ...
分类:其他好文   时间:2014-06-25 07:32:27    阅读次数:209
ZigZag Conversion
题目 The string "PAYPALISHIRING" is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern in a fixed font for better legibility) P A H ...
分类:其他好文   时间:2014-06-24 23:59:25    阅读次数:338
LeetCode——Single Number II
Given an array of integers, every element appears three times except for one. Find that single one. Note: Your algorithm should have a linear runtime complexity. Could you implement it without u...
分类:其他好文   时间:2014-06-24 15:52:58    阅读次数:222
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