题目:
Given an integer n, return the number of trailing zeroes in n!.
Note: Your solution should be in logarithmic time complexity.
思路:
我们要计算 N! 中有多少个后导0.
我们来找一下规律,考虑n!的质数因子。后缀0,只有可能是质因子2...
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编程语言 时间:
2015-01-11 16:16:18
阅读次数:
272
cat主要有三大功能:1.一次显示整个文件。 cat filename2.从键盘创建一个文件。 cat > filename 只能创建新文件,不能编辑已有文件.3.将几个文件合并为一个文件: cat file1 file2 > file参数:-n 或 --number 由 1 开始对所有输出...
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其他好文 时间:
2015-01-11 16:08:37
阅读次数:
235
题目:
Given a digit string, return all possible letter combinations that the number could represent.
A mapping of digit to letters (just like on the telephone buttons) is given below.
Input:D...
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编程语言 时间:
2015-01-11 14:56:20
阅读次数:
236
题目:
The gray code is a binary numeral system where two successive values differ in only one bit.
Given a non-negative integer n representing the total number of bits in the code, print the seque...
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编程语言 时间:
2015-01-11 12:27:43
阅读次数:
282
Palindrome Number判断正整数是否是回文。不许额外占用空间。【分析】题目提示说,如果想把整数变换成string型,不符合题目不额外占空间,另外You could also try reversing an integer. However, if you have solved the...
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其他好文 时间:
2015-01-11 12:22:45
阅读次数:
176
Find the contiguous subarray within an array (containing at least one number) which has the largest product.For example, given the array[2,3,-2,4],the...
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其他好文 时间:
2015-01-11 12:11:44
阅读次数:
133
The problem 1: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 t...
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其他好文 时间:
2015-01-11 06:07:49
阅读次数:
216
方法一:通过 To_Number 函数异常来判断
CREATE OR REPLACE FUNCTION Is_Number (
str_ VARCHAR2 ) RETURN VARCHAR2
IS
num_ NUMBER;
BEGIN
num_ := to_number(str_);
...
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数据库 时间:
2015-01-11 01:01:28
阅读次数:
167
Pebbles
Time Limit:1000MS Memory Limit:32768KB 64bit IO Format:%I64d & %I64u
Submit Status
Description
You're given an unlimited number of pebbles to distribute across an N x N g...
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其他好文 时间:
2015-01-10 22:24:07
阅读次数:
259
1.创建表1 CREATE TABLE book2 (3 bookId NUMBER,4 bookName VARCHAR2(50),5 publishHouse Varchar2(50)6 )2.----------有输入参数的存储过程(添加操作)----...
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其他好文 时间:
2015-01-10 19:39:42
阅读次数:
176