B. Perfect Number   time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output We consider a positive integer perfect, if and only if the sum of its digits is exactly 10. Given a positive integer k…

B. Perfect Number time limit per test2 seconds memory limit per test256 megabytes Problem Description We consider a positive integer perfect, if and only if the sum of its digits is exactly 10. Given a positive integer k, your task is to find the k-t…

题目传送门 B. Perfect Number time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output We consider a positive integer perfect, if and only if the sum of its digits is exactly 1010. Given a positive integ…

[codeforces 317]A. Perfect Pair 试题描述 Let us call a pair of integer numbers m-perfect, if at least one number in the pair is greater than or equal to m. Thus, the pairs (3, 3) and (0, 2) are 2-perfect while the pair (-1, 1) is not. Two integers x, y a…

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:…

这是悦乐书的第249次更新,第262篇原创 01 看题和准备 今天介绍的是LeetCode算法题中Easy级别的第116题(顺位题号是507).我们定义Perfect Number是一个正整数,它等于除了它自己之外的所有正除数之和.现在,给定一个整数n,编写一个函数,当它是一个完美数字时返回true,否则返回false.例如: 输入:28 输出:true 说明:28 = 1 + 2 + 4 + 7 + 14 注意:输入数字n不会超过100,000,000.(1E8) 本次解题使用的开发工具是ec…

\(>Codeforces\space980 D. Perfect Groups<\) 题目大意 : 设 \(F(S)\) 表示在集合\(S\)中把元素划分成若干组,使得每组内元素两两相乘的结果的都是完全平方数的最小组数 对于长度为\(n\)的序列 \(A\) ,对于每一个 \(k \, (1 \leq k \leq n)\) ,分别求出在\(A\)的所有子串中有多少 \([l, r]\) 满足 \(F(A[l, r]) = k\) $n \leq 5000, \space |A_{i}| \…

［抄题］: 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: I…