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欧拉计划(python) problem 7
10001st prime Problem 7 By listing the first six prime numbers: 2, 3, 5, 7, 11, and 13, we can see that the 6th prime is 13. What is the 10 001st prime number? python code : import ma...
分类:编程语言   时间:2015-01-26 22:47:11    阅读次数:208
欧拉计划(python) problem 8
Largest product in a series Problem 8 The four adjacent digits in the 1000-digit number that have the greatest product are 9 × 9 × 8 × 9 = 5832. 73167176531330624919225119674426574742355349...
分类:编程语言   时间:2015-01-26 22:46:14    阅读次数:357
cf B Very Beautiful Number
题意:给你两个数p和x,然后让你找出一个长度为p的数,把它的最后移到最前面之后得到的数是原来数字的x倍,有很多这样的数取最小。思路:枚举最后一位,然后就可以推出整个的一个数,然后比较得到的数的第一个数字和枚举的数字是否相等既可以。 1 #include 2 #include 3 #include.....
分类:其他好文   时间:2015-01-26 22:43:06    阅读次数:233
欧拉计划(python) problem 3
Problem 3 The prime factors of 13195 are 5, 7, 13 and 29. What is the largest prime factor of the number 600851475143 ? python code: import math sqrt=math.sqrt def func(x):     ...
分类:编程语言   时间:2015-01-26 21:07:23    阅读次数:216
Python2.7自学笔记1——使用python作为计算器
1、number数字可以直接在python运算,使用圆括号分组In[1]:2+2 Out[1]:4 In[2]:50-5*6 Out[2]:20 In[3]:(50-5.0*6)/4 Out[3]:5.0 In[4]:8/5.0 Out[4]:1.6在进行除法/的时候,如果2个除数都是int型,则返回的值也为整型int:如果有1个除数为浮点型float,则结果值为浮点型float..
分类:编程语言   时间:2015-01-26 19:29:46    阅读次数:224
POJ 1236 Network of School(强联通缩点)
Description A number of schools are connected to a computer network. Agreements have been developed among those schools: each school maintains a list of schools to which it distributes software (th...
分类:移动开发   时间:2015-01-26 19:22:23    阅读次数:214
UVA 318 Network(无向图求割点数)
A Telephone Line Company (TLC) is establishing a new telephone cable network. They are connecting several places numbered by integers from 1 to N. No two places have the same number. The lines are bid...
分类:Web程序   时间:2015-01-26 19:20:13    阅读次数:165
[leetcode] 152 Maximum Product Subarray
问题描述: 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 contiguous subarray [2,3] has the l...
分类:其他好文   时间:2015-01-26 19:18:05    阅读次数:145
oracle数字字符串是否有非法数字
select trim(translate(RTRIM(LTRIM(ITEM_NUMBER)), '#0123456789', '#')) from TestCharWhere trim(translate(RTRIM(LTRIM(ITEM_NUMBER)), '#0123456789', '#')...
分类:数据库   时间:2015-01-26 19:03:09    阅读次数:173
Leetcode#179 Largest Number
原题地址先将数字转成字符串,然后排序,让能够组成更大数字的字符串放在前面,最后拼接成完整的字符串即可。有种很巧妙的方法判断两个字符串的大小关系,假设两个字符串是A,B,则比较AB和BA,若AB比BA大,说明A应该放在前面,即A &num) { 2 string res; 3 4 vecto...
分类:其他好文   时间:2015-01-26 19:00:19    阅读次数:129
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