我的题解代码如下,leetcode上运行时间0ms,内存占用5.2MB intgetNext(intn){intsum=0;while(n>0){inttmp=n%10; sum+=tmp*tmp; n/=10; }returnsum; }boolisHappy(intn){intslowptr,fastptr; slowptr=n; fastptr=getNext(n);while(fastptr!=1&& fastptr!=slowptr){ slowptr=getNext(slowptr);...
202. Happy Number 解题方法 设置一个字典dic,当n不在字典中时,计算下一个数并加到字典中,如果下一个数算出来是1,就返回True,否则继续算新的n。如果找到一个n在字典中,就不做循环了直接返回False。 时间复杂度:O(logn) 空间复杂度:O(logn) 代码 classSolution:defisHappy(self,n:int)->bool:dic={}whi...
Can you solve this real interview question? Happy Number - Write an algorithm to determine if a number n 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
Those numbers for which this process ends in 1 are happy numbers.示例: 输入: 19 输出: true 解释: 1^2+ 9^2 = 82 8^2 + 2^2 = 68 6^2 + 8^2 = 100 1^2 + 0^2 + 0^2 = 1 解题思路: 求每个位上的数字平方和,判断是否为 1,如果不为 1 则继续求该数每位的平方和。
LeetCode 202. Happy Number 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 th...LeetCode - 202. Happy Number 👇题目描述 😊Solution : 执行的...
func isHappy(n int) bool { // used 维护已出现的数字集合 used := make(map[int]bool) // 当 n 未出现过时,继续计算下一个数 for !used[n] { // 标记 n 已出现过 used[n] = true // 计算下一个数,即求 n 的每一位的平方和 nxt := 0 // 当 n 不为 0 时,则还可以计算平方和 for...
Example:19 is a happy number 12+ 92= 82 82+ 22= 68 62+ 82= 100 12+ 02+ 02= 1 很自然的解法是: class Solution(object): def isHappy(self, n): """ :type n: int :rtype: bool """ def sum2(num): ans = 0 while num != 0: ...
[LeetCode]Happy Number Question 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 number ...
Happy Number (medium) Middle of the LinkedList (easy) 4. Pattern: Merge Intervals,区间合并类型 区间合并模式是一个用来处理有区间重叠的很高效的技术。在设计到区间的很多问题中,通常咱们需要要么判断是否有重叠,要么合并区间,如果他们重叠的话。这个模式是这么起作用的: 给两个区间,一个是a,另外一个是b。
202Happy NumberC 201Bitwise AND of Numbers RangeC 200Number of IslandsC 199Binary Tree Right Side ViewC 198House RobberC 191Number of 1 BitsC 190Reverse BitsC 189Rotate ArrayC 188Best Time to Buy and Sell Stock IV 187Repeated DNA Sequences ...