快速幂+等比数列求和.... Sumdiv Time Limit: 1000MS Memory Limit: 30000K Total Submissions: 12599 Accepted: 3057 Description Consider two natural numbers A and B. Let S be the sum of all natural divisors of A^B. Determine S modulo 9901 (the rest of the division…

Sumdiv Time Limit: 1000MS Memory Limit: 30000K Total Submissions: 16244 Accepted: 4044 Description Consider two natural numbers A and B. Let S be the sum of all natural divisors of A^B. Determine S modulo 9901 (the rest of the division of S by 9901).…

Sumdiv 题目连接: http://poj.org/problem?id=1845 Description Consider two natural numbers A and B. Let S be the sum of all natural divisors of A^B. Determine S modulo 9901 (the rest of the division of S by 9901). Input The only line contains the two natur…

Sumdiv Sumdiv Time Limit: 1000MS   Memory Limit: 30000K Total Submissions: 15364   Accepted: 3790 Description Consider two natural numbers A and B. Let S be the sum of all natural divisors of A^B. Determine S modulo 9901 (the rest of the division of…

筛选法+求一个整数的分解+快速模幂运算+递归求计算1+p+p^2+````+p^nPOJ 1845 Sumdiv求A^B的所有约数之和%9901 */#include<stdio.h>#include<math.h>#include<iostream>#include<algorithm>#include<string.h>using namespace std;#define MOD 9901const int MAXN=10000;int p…

sumdiv(POJ 1845) Description 给定两个自然数A和B,S为A^B的所有正整数约数和,编程输出S mod 9901的结果. Input Format 只有一行,两个用空格隔开的自然数A和B(0<=A,B<= 50000000). Output Format 只有一行,即S mod 9901的结果. Sample Input 2 3 Sample Output 15 解析 这是一道数学推导+分治的简单运用,大体思路如下. 由算数基本定理可得: \[A=p_1^{a_1}*…

题目链接:Sumdiv 题意:给定两个自然数A,B,定义S为A^B所有的自然因子的和,求出S mod 9901的值. 题解:了解下以下知识点   1.整数的唯一分解定理 任意正整数都有且只有唯一的方式写出其质因子的乘积表达式 $A={p_1}^{k_1}*{p_2}^{k_2}*{p_3}^{k_3}*...*{p_n}^{k_n}$ 2.整数因数个数 $B=(k_1+1)*(k_2+1)*(k_3+1)...*(k_n+1)$ 3.整数因数总和 $S=(1+p_1+p_1^2+p_1^3+..…

poj1845 Sumdiv 数学题 令人痛苦van分的数学题! 题意:求a^b的所有约数(包括1和它本身)之和%9901 这怎么做呀!!! 百度:约数和定理,会发现 p1^a1 * p2^a2 * ... * pn^an这个数的约数和是:(1 + p1 + p1^2 + ... + p1^a1) * (1 + p2 + ... + p2^a2) * ... * (1 + pn + ... + pn^an) 证明:由乘法原理可直接证明 然后我们对于a^b运用这个公式即可.那么对于 (1 + pi…

1633:[例 3]Sumdiv 时间限制: 1000 ms         内存限制: 524288 KB [题目描述] 原题来自:Romania OI 2002 求 ABAB 的所有约数之和 mod9901. [输入] 输入两个整数 A,B. [输出] 输出答案 mod9901. [输入样例] 2 3 [输出样例] 15 [提示] 样例说明 23=8,8 的所有约数为 1,2,4,8,1+2+4+8=15,15mod9901=15,因此输出 15. 数据范围与提示: 对于全部数据,0≤A,B…

任意门:http://poj.org/problem?id=1845. Sumdiv Time Limit: 1000MS Memory Limit: 30000K Total Submissions: 30268 Accepted: 7447 Description Consider two natural numbers A and B. Let S be the sum of all natural divisors of A^B. Determine S modulo 9901 (the…