筛法是一种很快的方法,贴代码纪念一下。 做法很像筛法 1 #include 2 #include 3 #include 4 #include 5 #include 6 #include 7 #include 8 #include 9 #include 10 #include 11 #...
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其他好文 时间:
2014-08-10 10:19:50
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223
想到 最小公倍数 其余的就好搞了 ,可是没想到#include #include #include #include #include #include #include #include #include #include #include #include #includeusing names...
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数据库 时间:
2014-08-09 23:11:49
阅读次数:
313
三进制搞下, 0 表示没出现过, 第i位为1 表示 i出现了奇数次, 2表示i 出现了偶数次。#include #include #include #include #include #include #include #include #include #include #include #inc...
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其他好文 时间:
2014-08-09 23:07:59
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325
Palindromes
A regular palindrome is a string of numbers or letters that is the same forward as backward. For example, the string "ABCDEDCBA" is a palindrome because it is the same when t...
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其他好文 时间:
2014-08-09 21:36:09
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344
Problem Description
The inversion number of a given number sequence a1, a2, ..., an is the number of pairs (ai, aj) that satisfy i aj. For a given sequence of numbers a1, a2, ..., an, if we move t...
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其他好文 时间:
2014-08-09 18:48:38
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241
Sumdiv
Time Limit: 1000MS
Memory Limit: 30000K
Total Submissions: 13959
Accepted: 3433
Description
Consider two natural numbers A and B. Let S be the sum of all natur...
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其他好文 时间:
2014-08-09 11:43:07
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226
Description
Ouroboros is a mythical snake from ancient Egypt. It has its tail in its mouth and continously devours itself.
The Ouroboros numbers are binary numbers of 2^n bits that have the prop...
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其他好文 时间:
2014-08-09 11:40:57
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315
Given a set of candidate numbers (C) and a target number (T), find all unique combinations in C where the candidate numbers sums to T.The same repeate...
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其他好文 时间:
2014-08-08 20:54:46
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246
Description
Given a list of phone numbers, determine if it is consistent in the sense that no number is the prefix of another. Let’s say the phone catalogue listed these numbers:
1. Emergency 911
...
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其他好文 时间:
2014-08-08 12:49:16
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187
链接:http://poj.org/problem?id=3641
题意:由费马小定理可得,对于素数p,a^p = a (mod p),但是对于某些非素数p,也有比较小的可能满足a^p = a (mod p),如果满足,则称p是a条件下的伪素数,现给出p,a,问p是不是a条件的伪素数。
思路:首先用米勒 罗宾判断p是不是素数,如果不是,判断a^p = a (mod p)是否成立。
代码:
...
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其他好文 时间:
2014-08-08 12:42:05
阅读次数:
232