题意:求\(n!\)的每个因子的因子数. 题解:我们可以对\(n!\)进行质因数分解,这里可以直接用推论快速求出:https://5ab-juruo.blog.luogu.org/solution-p2043, 所以我们可以得到\(n!=p^{k1}_1*p^{k_2}_2*...*p^{k_n}_n\),然后根据约数定理,它的任意一个因子可以表示为\(n!=p^{a1}_1*p^{a_2}_2*...*p^{a_n}_n\ (0\le a_i\le k_i)\),我们将某一个质数\(p^{a_…

题目链接:https://abc115.contest.atcoder.jp/ A Christmas Eve Eve Eve 题目: Time limit : 2sec / Memory limit : 1024MB Score : 100 points Problem Statement In some other world, today is December D-th. Write a program that prints Christmas if D=25, Christmas E…

原题链接在这里:https://leetcode.com/problems/perfect-number/#/description 题目: We define the Perfect Number is a positive integer that is equal to the sum of all its positive divisors except itself. Now, given an integer n, write a function that returns true…

[2]Add Two Numbers (2018年12月23日,review) 链表的高精度加法. 题解:链表专题:https://www.cnblogs.com/zhangwanying/p/9797184.html [7]Reverse Integer (2018年12月23日, review) 给了一个32位的整数,返回它的reverse后的整数.如果reverse后的数超过了整数的范围,就返回 0. Example 1: Input: 123 Output: 321 Example 2:…

题目描述 给定两个整数,被除数 dividend 和除数 divisor.将两数相除,要求不使用乘法.除法和 mod 运算符. 返回被除数 dividend 除以除数 divisor 得到的商. 整数除法的结果应当截去(truncate)其小数部分,例如:truncate(8.345) = 8 以及 truncate(-2.7335) = -2 示例 1: 输入: dividend = 10, divisor = 3 输出: 3 解释: 10/3 = truncate(3.33333..) =…

第 7 章 C 控制语句:分支和跳转 在本章中你将学习下列内容: · 关键字:if(如果),else(否则),switch(切换),continue(继续),break(中断), case(情况),default(缺省),goto(转到) · 运算符: &&(逻辑与), ||(逻辑或), ?: (条件运算) · 函数: getchar(), putchar()以及 ctype.h 系列. · 怎样使用 if 和 if else 语句以及如何嵌套使用它们. · 使用逻辑运算符将关系表达式组合…

We define the Perfect Number is a positive integer that is equal to the sum of all its positive divisors except itself. Now, given an integer n, write a function that returns true when it is a perfect number and false when it is not. Example: Input:…

We define the Perfect Number is a positive integer that is equal to the sum of all its positive divisors except itself. Now, given an integer n, write a function that returns true when it is a perfect number and false when it is not. Example: Input:…

We define the Perfect Number is a positive integer that is equal to the sum of all its positive divisors except itself. Now, given an integer n, write a function that returns true when it is a perfect number and false when it is not. Example: Input:…

We define the Perfect Number is a positive integer that is equal to the sum of all its positive divisors except itself. Now, given an integer n, write a function that returns true when it is a perfect number and false when it is not. Example: Input:…