数学--数论--POJ1365——Prime Land

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数学--数论--POJ1365——Prime Land

Description Everybody in the Prime Land is using a prime base number system. In this system, each positive integer x is represented as follows: Let {pi}i=0,1,2,... denote the increasing sequence of all prime numbers. We know that x > 1 can be represe…

[暑假集训--数论]poj1365 Prime Land

Everybody in the Prime Land is using a prime base number system. In this system, each positive integer x is represented as follows: Let {pi}i=0,1,2,... denote the increasing sequence of all prime numbers. We know that x > 1 can be represented in only…

POJ1365 - Prime Land（质因数分解）

题目大意给定一个数的质因子表达式,要求你计算机它的值,并减一,再对这个值进行质因数分解,输出表达式题解预处理一下,线性筛法筛下素数,然后求出值来之后再用筛选出的素数去分解....其实主要就是字符串处理... 代码: #include <stdio.h> #include <string.h> #include <math.h> #define MAXN 10000 ]; ],cnt=; ]; void get_prime() { ; memset(check,fa…

POJ1365 Prime Land【质因数分解】【素数】【水题】

题目链接: http://poj.org/problem?id=1365 题目大意: 告诉你一个数的质因数x的全部底数pi和幂ei.输出x-1的质因数的全部底数和幂解题思路: 这道题不难.可是题意特别不好理解.对于我这样的英文渣的人.愣是一个小时没看明确关于题意举例说明吧比如 509 1 59 1 x = 509^1 * 59^1 = 30031 x-1 = 30030 则答案 13 1 11 1 7 1 5 1 3 1 2 1 就是 x-1 = 13^1 * 11^1 * 7^1 * 5…

POJ 1365 Prime Land（数论）

题目链接: 传送门 Prime Land Time Limit: 1000MS Memory Limit: 10000K Description Everybody in the Prime Land is using a prime base number system. In this system, each positive integer x is represented as follows: Let {pi}i=0,1,2,... denote the increasing…

[POJ 1365] Prime Land

Prime Land Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 3211 Accepted: 1473 Description Everybody in the Prime Land is using a prime base number system. In this system, each positive integer x is represented as follows: Let {pi}i=0,…

数学--数论--HDU2136 Largest prime factor 线性筛法变形

Problem Description Everybody knows any number can be combined by the prime number. Now, your task is telling me what position of the largest prime factor. The position of prime 2 is 1, prime 3 is 2, and prime 5 is 3, etc. Specially, LPF(1) = 0. Inpu…