寻找完全数(C++)

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Matlab练习——寻找完全数

clc; clear; wq = []; : sum = ; k = ; : i / sum = sum + j; end end == i wq=[wq i]; end end disp(['2至10000之间的完全数有: ',num2str(wq)])…

[问题描述] 输入一个大于 1 的正整数 n,请你将大于 1 和小于或等于 n 的所有完全数输出.所谓完全数就是因子(不算其本身)之和等于它本身的数.例如 1+2+4+7+14=28,所以 28 是完全数.如果有多个完全数,每两个完全数之间用一个空格隔开,如果没有,请输出 0 . [代码展示] # include<iostream>using namespace std;int main(){ int n,s; cin >> n; for(int i=2;i<=n;i++){…

《C程序设计的抽象思维》1.9编程练习

本文地址:http://www.cnblogs.com/archimedes/p/programming-abstractions-in-c-1.html,转载请注明源地址. 1.温度转换: #include<stdio.h> int main() { double C; while(~scanf("%lf", &C)) printf( * C * + ); ; } 2.长度转换: #include<stdio.h> int main() { doubl…

如何使用python在短时间内寻找完数

完数:完全数(Perfect number),又称完美数或完备数,是一些特殊的自然数.它所有的真因子(即除了自身以外的约数)的和(即因子函数),恰好等于它本身.如果一个数恰好等于它的因子之和,则称该数为“完全数”.如6,它的因子除了它本身外还有1.2.3,1+2+3=6,可以得出6为完数. 案例:如何用python寻找1000以内的完数. 在求完数时,完数的因子范围是(1,i-1),但是在用for循环遍历时,因子的范围需要设置为(1,i).因为for循环遍历的规则可以理解为“前包后不包”,如:f…

[LeetCode] Find the Celebrity 寻找名人

Suppose you are at a party with n people (labeled from 0 to n - 1) and among them, there may exist one celebrity. The definition of a celebrity is that all the other n - 1people know him/her but he/she does not know any of them. Now you want to find…

[LeetCode] Find Minimum in Rotated Sorted Array II 寻找旋转有序数组的最小值之二

Follow up for "Find Minimum in Rotated Sorted Array":What if duplicates are allowed? Would this affect the run-time complexity? How and why? Suppose a sorted array is rotated at some pivot unknown to you beforehand. (i.e., 0 1 2 4 5 6 7 might be…

[LeetCode] Find Minimum in Rotated Sorted Array 寻找旋转有序数组的最小值

Suppose a sorted array is rotated at some pivot unknown to you beforehand. (i.e., 0 1 2 4 5 6 7 might become 4 5 6 7 0 1 2). Find the minimum element. You may assume no duplicate exists in the array. 这道寻找旋转有序数组的最小值肯定不能通过直接遍历整个数组来寻找,这个方法过于简单粗暴,这样的话,旋不…