package isHappy202; /* * Write an algorithm to determine if a number is "happy". A happy number is a number defined by the following process: Starting with any positive integer, replace the number by the sum of the squares of its digits, and rep…

题目: Write an algorithm to determine if a number is "happy". A happy number is a number defined by the following process: Starting with any positive integer, replace the number by the sum of the squares of its digits, and repeat the process until…

Write an algorithm to determine if a number is "happy". 写出一个算法确定一个数是不是快乐数. A happy number is a number defined by the following process: Starting with any positive integer, replace the number by the sum of the squares of its digits, and repeat th…

Write an algorithm to determine if a number is "happy". A happy number is a number defined by the following process: Starting with any positive integer, replace the number by the sum of the squares of its digits, and repeat the process until the…

static List<int> nums = new List<int>(); public static bool IsHappy(int n) { int newint = 0; while (n != 0) { newint += ((n % 10) * (n % 10)); n = n / 10; } if (newint == 1) return true; if (nums.Contains(newint)) { return false; } else { nums…

public class Solution { private int SumSqares(int n) { //将一个数字的各个数位的值分开存储 var list = new List<int>(); do { ; list.Add(x); n = n / ; } ); ; foreach (var l in list) { sum += l * l; } return sum; } public bool IsHappy(int n) { var list = new List<in…

题目 编写一个算法来判断一个数 n 是不是快乐数. 快乐数定义为:对于一个正整数,每一次将该数替换为它每个位置上的数字的平方和,然后重复这个过程直到这个数变为 1, 也可能是 无限循环 但始终变不到 1.如果 可以变为  1,那么这个数就是快乐数.如果 n 是快乐数就返回 True :不是,则返回 False . 分析 本题开始一头雾水,因为可能无限循环.这题关键就在此.思考怎样会出现出现无限循环?也就是什么情况下会判定为非快乐数? 如果当前计算得到的各位平方和之前出现过,意味着就出现了循环,以…

精品刷题路线参考: https://github.com/youngyangyang04/leetcode-master https://github.com/chefyuan/algorithm-base 哈希表基础 哈希表也叫散列表,哈希表是一种映射型的数据结构. 哈希表是根据关键码的值而直接进行访问的数据结构. 就好像老三和老三的工位:有人来找老三,前台小姐姐一指,那个像狗窝一样的就是老三的工位. 总体来说,散列表由两个要素构成:桶数组与散列函数. 桶及桶数组 散列表使用的桶数组(Buck…